light_logLight Log - A Defensive Programming Library for Pine Script
Overview
The Light Log library transforms Pine Script development by introducing structured logging and defensive programming patterns typically found in enterprise languages like C#. This library addresses a fundamental challenge in Pine Script: the lack of sophisticated error handling and debugging tools that developers expect when building complex trading systems.
At its core, Light Log provides three transformative capabilities that work together to create more reliable and maintainable code. First, it wraps all native Pine Script types in error-aware containers, allowing values to carry validation state alongside their data. Second, it offers a comprehensive logging system with severity levels and conditional rendering. Third, it includes defensive programming utilities that catch errors early and make code self-documenting.
The Philosophy of Errors as Values
Traditional Pine Script error handling relies on runtime errors that halt execution, making it difficult to build resilient systems that can gracefully handle edge cases. Light Log introduces a paradigm shift by treating errors as first-class values that flow through your program alongside regular data.
When you wrap a value using Light Log's type system, you're not just storing data – you're creating a container that can carry both the value and its validation state. For example, when you call myNumber.INT() , you receive an INT object that contains both the integer value and a Log object that can describe any issues with that value. This approach, inspired by functional programming languages, allows errors to propagate through calculations without causing immediate failures.
Consider how this changes error handling in practice. Instead of a calculation failing catastrophically when it encounters invalid input, it can produce a result object that contains both the computed value (which might be na) and a detailed log explaining what went wrong. Subsequent operations can check has_error() to decide whether to proceed or handle the error condition gracefully.
The Typed Wrapper System
Light Log provides typed wrappers for every native Pine Script type: INT, FLOAT, BOOL, STRING, COLOR, LINE, LABEL, BOX, TABLE, CHART_POINT, POLYLINE, and LINEFILL. These wrappers serve multiple purposes beyond simple value storage.
Each wrapper type contains two fields: the value field v holds the actual data, while the error field e contains a Log object that tracks the value's validation state. This dual nature enables powerful programming patterns. You can perform operations on wrapped values and accumulate error information along the way, creating an audit trail of how values were processed.
The wrapper system includes convenient methods for converting between wrapped and unwrapped values. The extension methods like INT() , FLOAT() , etc., make it easy to wrap existing values, while the from_INT() , from_FLOAT() methods extract the underlying values when needed. The has_error() method provides a consistent interface for checking whether any wrapped value has encountered issues during processing.
The Log Object: Your Debugging Companion
The Log object represents the heart of Light Log's debugging capabilities. Unlike simple string concatenation for error messages, the Log object provides a structured approach to building, modifying, and rendering diagnostic information.
Each Log object carries three essential pieces of information: an error type (info, warning, error, or runtime_error), a message string that can be built incrementally, and an active flag that controls conditional rendering. This structure enables sophisticated logging patterns where you can build up detailed diagnostic information throughout your script's execution and decide later whether and how to display it.
The Log object's methods support fluent chaining, allowing you to build complex messages in a readable way. The write() and write_line() methods append text to the log, while new_line() adds formatting. The clear() method resets the log for reuse, and the rendering methods ( render_now() , render_condition() , and the general render() ) control when and how messages appear.
Defensive Programming Made Easy
Light Log's argument validation functions transform how you write defensive code. Instead of cluttering your functions with verbose validation logic, you can use concise, self-documenting calls that make your intentions clear.
The argument_error() function provides strict validation that halts execution when conditions aren't met – perfect for catching programming errors early. For less critical issues, argument_log_warning() and argument_log_error() record problems without stopping execution, while argument_log_info() provides debug visibility into your function's behavior.
These functions follow a consistent pattern: they take a condition to check, the function name, the argument name, and a descriptive message. This consistency makes error messages predictable and helpful, automatically formatting them to show exactly where problems occurred.
Building Modular, Reusable Code
Light Log encourages a modular approach to Pine Script development by providing tools that make functions more self-contained and reliable. When functions validate their inputs and return wrapped values with error information, they become true black boxes that can be safely composed into larger systems.
The void_return() function addresses Pine Script's requirement that all code paths return a value, even in error handling branches. This utility function provides a clean way to satisfy the compiler while making it clear that a particular code path should never execute.
The static log pattern, initialized with init_static_log() , enables module-wide error tracking. You can create a persistent Log object that accumulates information across multiple function calls, building a comprehensive diagnostic report that helps you understand complex behaviors in your indicators and strategies.
Real-World Applications
In practice, Light Log shines when building sophisticated trading systems. Imagine developing a complex indicator that processes multiple data streams, performs statistical calculations, and generates trading signals. With Light Log, each processing stage can validate its inputs, perform calculations, and pass along both results and diagnostic information.
For example, a moving average calculation might check that the period is positive, that sufficient data exists, and that the input series contains valid values. Instead of failing silently or throwing runtime errors, it can return a FLOAT object that contains either the calculated average or a detailed explanation of why the calculation couldn't be performed.
Strategy developers benefit even more from Light Log's capabilities. Complex entry and exit logic often involves multiple conditions that must all be satisfied. With Light Log, each condition check can contribute to a comprehensive log that explains exactly why a trade was or wasn't taken, making strategy debugging and optimization much more straightforward.
Performance Considerations
While Light Log adds a layer of abstraction over raw Pine Script values, its design minimizes performance impact. The wrapper objects are lightweight, containing only two fields. The logging operations only consume resources when actually rendered, and the conditional rendering system ensures that production code can run with logging disabled for maximum performance.
The library follows Pine Script best practices for performance, using appropriate data structures and avoiding unnecessary operations. The var keyword in init_static_log() ensures that persistent logs don't create new objects on every bar, maintaining efficiency even in real-time calculations.
Getting Started
Adopting Light Log in your Pine Script projects is straightforward. Import the library, wrap your critical values, add validation to your functions, and use Log objects to track important events. Start small by adding logging to a single function, then expand as you see the benefits of better error visibility and code organization.
Remember that Light Log is designed to grow with your needs. You can use as much or as little of its functionality as makes sense for your project. Even simple uses, like adding argument validation to key functions, can significantly improve code reliability and debugging ease.
Transform your Pine Script development experience with Light Log – because professional trading systems deserve professional development tools.
Light Log Technical Deep Dive: Advanced Patterns and Architecture
Understanding Errors as Values
The concept of "errors as values" represents a fundamental shift in how we think about error handling in Pine Script. In traditional Pine Script development, errors are events – they happen at a specific moment in time and immediately interrupt program flow. Light Log transforms errors into data – they become information that flows through your program just like any other value.
This transformation has profound implications. When errors are values, they can be stored, passed between functions, accumulated, transformed, and inspected. They become part of your program's data flow rather than exceptions to it. This approach, popularized by languages like Rust with its Result type and Haskell with its Either monad, brings functional programming's elegance to Pine Script.
Consider a practical example. Traditional Pine Script might calculate a momentum indicator like this:
momentum = close - close
If period is invalid or if there isn't enough historical data, this calculation might produce na or cause subtle bugs. With Light Log's approach:
calculate_momentum(src, period)=>
result = src.FLOAT()
if period <= 0
result.e.write("Invalid period: must be positive", true, ErrorType.error)
result.v := na
else if bar_index < period
result.e.write("Insufficient data: need " + str.tostring(period) + " bars", true, ErrorType.warning)
result.v := na
else
result.v := src - src
result.e.write("Momentum calculated successfully", false, ErrorType.info)
result
Now the function returns not just a value but a complete computational result that includes diagnostic information. Calling code can make intelligent decisions based on both the value and its associated metadata.
The Monad Pattern in Pine Script
While Pine Script lacks the type system features to implement true monads, Light Log brings monadic thinking to Pine Script development. The wrapped types (INT, FLOAT, etc.) act as computational contexts that carry both values and metadata through a series of transformations.
The key insight of monadic programming is that you can chain operations while automatically propagating context. In Light Log, this context is the error state. When you have a FLOAT that contains an error, operations on that FLOAT can check the error state and decide whether to proceed or propagate the error.
This pattern enables what functional programmers call "railway-oriented programming" – your code follows a success track when all is well but can switch to an error track when problems occur. Both tracks lead to the same destination (a result with error information), but they take different paths based on the validity of intermediate values.
Composable Error Handling
Light Log's design encourages composition – building complex functionality from simpler, well-tested components. Each component can validate its inputs, perform its calculation, and return a result with appropriate error information. Higher-level functions can then combine these results intelligently.
Consider building a complex trading signal from multiple indicators:
generate_signal(src, fast_period, slow_period, signal_period) =>
log = init_static_log(ErrorType.info)
// Calculate components with error tracking
fast_ma = calculate_ma(src, fast_period)
slow_ma = calculate_ma(src, slow_period)
// Check for errors in components
if fast_ma.has_error()
log.write_line("Fast MA error: " + fast_ma.e.message, true)
if slow_ma.has_error()
log.write_line("Slow MA error: " + slow_ma.e.message, true)
// Proceed with calculation if no errors
signal = 0.0.FLOAT()
if not (fast_ma.has_error() or slow_ma.has_error())
macd_line = fast_ma.v - slow_ma.v
signal_line = calculate_ma(macd_line, signal_period)
if signal_line.has_error()
log.write_line("Signal line error: " + signal_line.e.message, true)
signal.e := log
else
signal.v := macd_line - signal_line.v
log.write("Signal generated successfully")
else
signal.e := log
signal.v := na
signal
This composable approach makes complex calculations more reliable and easier to debug. Each component is responsible for its own validation and error reporting, and the composite function orchestrates these components while maintaining comprehensive error tracking.
The Static Log Pattern
The init_static_log() function introduces a powerful pattern for maintaining state across function calls. In Pine Script, the var keyword creates variables that persist across bars but are initialized only once. Light Log leverages this to create logging objects that can accumulate information throughout a script's execution.
This pattern is particularly valuable for debugging complex strategies where you need to understand behavior across multiple bars. You can create module-level logs that track important events:
// Module-level diagnostic log
diagnostics = init_static_log(ErrorType.info)
// Track strategy decisions across bars
check_entry_conditions() =>
diagnostics.clear() // Start fresh each bar
diagnostics.write_line("Bar " + str.tostring(bar_index) + " analysis:")
if close > sma(close, 20)
diagnostics.write_line("Price above SMA20", false)
else
diagnostics.write_line("Price below SMA20 - no entry", true, ErrorType.warning)
if volume > sma(volume, 20) * 1.5
diagnostics.write_line("Volume surge detected", false)
else
diagnostics.write_line("Normal volume", false)
// Render diagnostics based on verbosity setting
if debug_mode
diagnostics.render_now()
Advanced Validation Patterns
Light Log's argument validation functions enable sophisticated precondition checking that goes beyond simple null checks. You can implement complex validation logic while keeping your code readable:
validate_price_data(open_val, high_val, low_val, close_val) =>
argument_error(na(open_val) or na(high_val) or na(low_val) or na(close_val),
"validate_price_data", "OHLC values", "contain na values")
argument_error(high_val < low_val,
"validate_price_data", "high/low", "high is less than low")
argument_error(close_val > high_val or close_val < low_val,
"validate_price_data", "close", "is outside high/low range")
argument_log_warning(high_val == low_val,
"validate_price_data", "high/low", "are equal (no range)")
This validation function documents its requirements clearly and fails fast with helpful error messages when assumptions are violated. The mix of errors (which halt execution) and warnings (which allow continuation) provides fine-grained control over how strict your validation should be.
Performance Optimization Strategies
While Light Log adds abstraction, careful design minimizes overhead. Understanding Pine Script's execution model helps you use Light Log efficiently.
Pine Script executes once per bar, so operations that seem expensive in traditional programming might have negligible impact. However, when building real-time systems, every optimization matters. Light Log provides several patterns for efficient use:
Lazy Evaluation: Log messages are only built when they'll be rendered. Use conditional logging to avoid string concatenation in production:
if debug_mode
log.write_line("Calculated value: " + str.tostring(complex_calculation))
Selective Wrapping: Not every value needs error tracking. Wrap values at API boundaries and critical calculation points, but use raw values for simple operations:
// Wrap at boundaries
input_price = close.FLOAT()
validated_period = validate_period(input_period).INT()
// Use raw values internally
sum = 0.0
for i = 0 to validated_period.v - 1
sum += close
Error Propagation: When errors occur early, avoid expensive calculations:
process_data(input) =>
validated = validate_input(input)
if validated.has_error()
validated // Return early with error
else
// Expensive processing only if valid
perform_complex_calculation(validated)
Integration Patterns
Light Log integrates smoothly with existing Pine Script code. You can adopt it incrementally, starting with critical functions and expanding coverage as needed.
Boundary Validation: Add Light Log at the boundaries of your system – where user input enters and where final outputs are produced. This catches most errors while minimizing changes to existing code.
Progressive Enhancement: Start by adding argument validation to existing functions. Then wrap return values. Finally, add comprehensive logging. Each step improves reliability without requiring a complete rewrite.
Testing and Debugging: Use Light Log's conditional rendering to create debug modes for your scripts. Production users see clean output while developers get detailed diagnostics:
// User input for debug mode
debug = input.bool(false, "Enable debug logging")
// Conditional diagnostic output
if debug
diagnostics.render_now()
else
diagnostics.render_condition() // Only shows errors/warnings
Future-Proofing Your Code
Light Log's patterns prepare your code for Pine Script's evolution. As Pine Script adds more sophisticated features, code that uses structured error handling and defensive programming will adapt more easily than code that relies on implicit assumptions.
The type wrapper system, in particular, positions your code to take advantage of potential future features or more sophisticated type inference. By thinking in terms of wrapped values and error propagation today, you're building code that will remain maintainable and extensible tomorrow.
Light Log doesn't just make your Pine Script better today – it prepares it for the trading systems you'll need to build tomorrow.
Library "light_log"
A lightweight logging and defensive programming library for Pine Script.
Designed for modular and extensible scripts, this utility provides structured runtime validation,
conditional logging, and reusable `Log` objects for centralized error propagation.
It also introduces a typed wrapping system for all native Pine values (e.g., `INT`, `FLOAT`, `LABEL`),
allowing values to carry errors alongside data. This enables functional-style flows with built-in
validation tracking, error detection (`has_error()`), and fluent chaining.
Inspired by structured logging patterns found in systems like C#, it reduces boilerplate,
enforces argument safety, and encourages clean, maintainable code architecture.
method INT(self, error_type)
Wraps an `int` value into an `INT` struct with an optional log severity.
Namespace types: series int, simple int, input int, const int
Parameters:
self (int) : The raw `int` value to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: An `INT` object containing the value and a default Log instance.
method FLOAT(self, error_type)
Wraps a `float` value into a `FLOAT` struct with an optional log severity.
Namespace types: series float, simple float, input float, const float
Parameters:
self (float) : The raw `float` value to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `FLOAT` object containing the value and a default Log instance.
method BOOL(self, error_type)
Wraps a `bool` value into a `BOOL` struct with an optional log severity.
Namespace types: series bool, simple bool, input bool, const bool
Parameters:
self (bool) : The raw `bool` value to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `BOOL` object containing the value and a default Log instance.
method STRING(self, error_type)
Wraps a `string` value into a `STRING` struct with an optional log severity.
Namespace types: series string, simple string, input string, const string
Parameters:
self (string) : The raw `string` value to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `STRING` object containing the value and a default Log instance.
method COLOR(self, error_type)
Wraps a `color` value into a `COLOR` struct with an optional log severity.
Namespace types: series color, simple color, input color, const color
Parameters:
self (color) : The raw `color` value to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `COLOR` object containing the value and a default Log instance.
method LINE(self, error_type)
Wraps a `line` object into a `LINE` struct with an optional log severity.
Namespace types: series line
Parameters:
self (line) : The raw `line` object to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `LINE` object containing the value and a default Log instance.
method LABEL(self, error_type)
Wraps a `label` object into a `LABEL` struct with an optional log severity.
Namespace types: series label
Parameters:
self (label) : The raw `label` object to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `LABEL` object containing the value and a default Log instance.
method BOX(self, error_type)
Wraps a `box` object into a `BOX` struct with an optional log severity.
Namespace types: series box
Parameters:
self (box) : The raw `box` object to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `BOX` object containing the value and a default Log instance.
method TABLE(self, error_type)
Wraps a `table` object into a `TABLE` struct with an optional log severity.
Namespace types: series table
Parameters:
self (table) : The raw `table` object to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `TABLE` object containing the value and a default Log instance.
method CHART_POINT(self, error_type)
Wraps a `chart.point` value into a `CHART_POINT` struct with an optional log severity.
Namespace types: chart.point
Parameters:
self (chart.point) : The raw `chart.point` value to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `CHART_POINT` object containing the value and a default Log instance.
method POLYLINE(self, error_type)
Wraps a `polyline` object into a `POLYLINE` struct with an optional log severity.
Namespace types: series polyline, series polyline, series polyline, series polyline
Parameters:
self (polyline) : The raw `polyline` object to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `POLYLINE` object containing the value and a default Log instance.
method LINEFILL(self, error_type)
Wraps a `linefill` object into a `LINEFILL` struct with an optional log severity.
Namespace types: series linefill
Parameters:
self (linefill) : The raw `linefill` object to wrap.
error_type (series ErrorType) : Optional severity level to associate with the log. Default is `ErrorType.error`.
Returns: A `LINEFILL` object containing the value and a default Log instance.
method from_INT(self)
Extracts the integer value from an INT wrapper.
Namespace types: INT
Parameters:
self (INT) : The wrapped INT instance.
Returns: The underlying `int` value.
method from_FLOAT(self)
Extracts the float value from a FLOAT wrapper.
Namespace types: FLOAT
Parameters:
self (FLOAT) : The wrapped FLOAT instance.
Returns: The underlying `float` value.
method from_BOOL(self)
Extracts the boolean value from a BOOL wrapper.
Namespace types: BOOL
Parameters:
self (BOOL) : The wrapped BOOL instance.
Returns: The underlying `bool` value.
method from_STRING(self)
Extracts the string value from a STRING wrapper.
Namespace types: STRING
Parameters:
self (STRING) : The wrapped STRING instance.
Returns: The underlying `string` value.
method from_COLOR(self)
Extracts the color value from a COLOR wrapper.
Namespace types: COLOR
Parameters:
self (COLOR) : The wrapped COLOR instance.
Returns: The underlying `color` value.
method from_LINE(self)
Extracts the line object from a LINE wrapper.
Namespace types: LINE
Parameters:
self (LINE) : The wrapped LINE instance.
Returns: The underlying `line` object.
method from_LABEL(self)
Extracts the label object from a LABEL wrapper.
Namespace types: LABEL
Parameters:
self (LABEL) : The wrapped LABEL instance.
Returns: The underlying `label` object.
method from_BOX(self)
Extracts the box object from a BOX wrapper.
Namespace types: BOX
Parameters:
self (BOX) : The wrapped BOX instance.
Returns: The underlying `box` object.
method from_TABLE(self)
Extracts the table object from a TABLE wrapper.
Namespace types: TABLE
Parameters:
self (TABLE) : The wrapped TABLE instance.
Returns: The underlying `table` object.
method from_CHART_POINT(self)
Extracts the chart.point from a CHART_POINT wrapper.
Namespace types: CHART_POINT
Parameters:
self (CHART_POINT) : The wrapped CHART_POINT instance.
Returns: The underlying `chart.point` value.
method from_POLYLINE(self)
Extracts the polyline object from a POLYLINE wrapper.
Namespace types: POLYLINE
Parameters:
self (POLYLINE) : The wrapped POLYLINE instance.
Returns: The underlying `polyline` object.
method from_LINEFILL(self)
Extracts the linefill object from a LINEFILL wrapper.
Namespace types: LINEFILL
Parameters:
self (LINEFILL) : The wrapped LINEFILL instance.
Returns: The underlying `linefill` object.
method has_error(self)
Returns true if the INT wrapper has an active log entry.
Namespace types: INT
Parameters:
self (INT) : The INT instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the FLOAT wrapper has an active log entry.
Namespace types: FLOAT
Parameters:
self (FLOAT) : The FLOAT instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the BOOL wrapper has an active log entry.
Namespace types: BOOL
Parameters:
self (BOOL) : The BOOL instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the STRING wrapper has an active log entry.
Namespace types: STRING
Parameters:
self (STRING) : The STRING instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the COLOR wrapper has an active log entry.
Namespace types: COLOR
Parameters:
self (COLOR) : The COLOR instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the LINE wrapper has an active log entry.
Namespace types: LINE
Parameters:
self (LINE) : The LINE instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the LABEL wrapper has an active log entry.
Namespace types: LABEL
Parameters:
self (LABEL) : The LABEL instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the BOX wrapper has an active log entry.
Namespace types: BOX
Parameters:
self (BOX) : The BOX instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the TABLE wrapper has an active log entry.
Namespace types: TABLE
Parameters:
self (TABLE) : The TABLE instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the CHART_POINT wrapper has an active log entry.
Namespace types: CHART_POINT
Parameters:
self (CHART_POINT) : The CHART_POINT instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the POLYLINE wrapper has an active log entry.
Namespace types: POLYLINE
Parameters:
self (POLYLINE) : The POLYLINE instance to check.
Returns: True if an error or message is active in the log.
method has_error(self)
Returns true if the LINEFILL wrapper has an active log entry.
Namespace types: LINEFILL
Parameters:
self (LINEFILL) : The LINEFILL instance to check.
Returns: True if an error or message is active in the log.
void_return()
Utility function used when a return is syntactically required but functionally unnecessary.
Returns: Nothing. Function never executes its body.
argument_error(condition, function, argument, message)
Throws a runtime error when a condition is met. Used for strict argument validation.
Parameters:
condition (bool) : Boolean expression that triggers the runtime error.
function (string) : Name of the calling function (for formatting).
argument (string) : Name of the problematic argument.
message (string) : Description of the error cause.
Returns: Never returns. Halts execution if the condition is true.
argument_log_info(condition, function, argument, message)
Logs an informational message when a condition is met. Used for optional debug visibility.
Parameters:
condition (bool) : Boolean expression that triggers the log.
function (string) : Name of the calling function.
argument (string) : Argument name being referenced.
message (string) : Informational message to log.
Returns: Nothing. Logs if the condition is true.
argument_log_warning(condition, function, argument, message)
Logs a warning when a condition is met. Non-fatal but highlights potential issues.
Parameters:
condition (bool) : Boolean expression that triggers the warning.
function (string) : Name of the calling function.
argument (string) : Argument name being referenced.
message (string) : Warning message to log.
Returns: Nothing. Logs if the condition is true.
argument_log_error(condition, function, argument, message)
Logs an error message when a condition is met. Does not halt execution.
Parameters:
condition (bool) : Boolean expression that triggers the error log.
function (string) : Name of the calling function.
argument (string) : Argument name being referenced.
message (string) : Error message to log.
Returns: Nothing. Logs if the condition is true.
init_static_log(error_type, message, active)
Initializes a persistent (var) Log object. Ideal for global logging in scripts or modules.
Parameters:
error_type (series ErrorType) : Initial severity level (required).
message (string) : Optional starting message string. Default value of ("").
active (bool) : Whether the log should be flagged active on initialization. Default value of (false).
Returns: A static Log object with the given parameters.
method new_line(self)
Appends a newline character to the Log message. Useful for separating entries during chained writes.
Namespace types: Log
Parameters:
self (Log) : The Log instance to modify.
Returns: The updated Log object with a newline appended.
method write(self, message, flag_active, error_type)
Appends a message to a Log object without a newline. Updates severity and active state if specified.
Namespace types: Log
Parameters:
self (Log) : The Log instance being modified.
message (string) : The text to append to the log.
flag_active (bool) : Whether to activate the log for conditional rendering. Default value of (false).
error_type (series ErrorType) : Optional override for the severity level. Default value of (na).
Returns: The updated Log object.
method write_line(self, message, flag_active, error_type)
Appends a message to a Log object, prefixed with a newline for clarity.
Namespace types: Log
Parameters:
self (Log) : The Log instance being modified.
message (string) : The text to append to the log.
flag_active (bool) : Whether to activate the log for conditional rendering. Default value of (false).
error_type (series ErrorType) : Optional override for the severity level. Default value of (na).
Returns: The updated Log object.
method clear(self, flag_active, error_type)
Clears a Log object’s message and optionally reactivates it. Can also update the error type.
Namespace types: Log
Parameters:
self (Log) : The Log instance being cleared.
flag_active (bool) : Whether to activate the log after clearing. Default value of (false).
error_type (series ErrorType) : Optional new error type to assign. If not provided, the previous type is retained. Default value of (na).
Returns: The cleared Log object.
method render_condition(self, flag_active, error_type)
Conditionally renders the log if it is active. Allows overriding error type and controlling active state afterward.
Namespace types: Log
Parameters:
self (Log) : The Log instance to evaluate and render.
flag_active (bool) : Whether to activate the log after rendering. Default value of (false).
error_type (series ErrorType) : Optional error type override. Useful for contextual formatting just before rendering. Default value of (na).
Returns: The updated Log object.
method render_now(self, flag_active, error_type)
Immediately renders the log regardless of `active` state. Allows overriding error type and active flag.
Namespace types: Log
Parameters:
self (Log) : The Log instance to render.
flag_active (bool) : Whether to activate the log after rendering. Default value of (false).
error_type (series ErrorType) : Optional error type override. Allows dynamic severity adjustment at render time. Default value of (na).
Returns: The updated Log object.
render(self, condition, flag_active, error_type)
Renders the log conditionally or unconditionally. Allows full control over render behavior.
Parameters:
self (Log) : The Log instance to render.
condition (bool) : If true, renders only if the log is active. If false, always renders. Default value of (false).
flag_active (bool) : Whether to activate the log after rendering. Default value of (false).
error_type (series ErrorType) : Optional error type override passed to the render methods. Default value of (na).
Returns: The updated Log object.
Log
A structured object used to store and render logging messages.
Fields:
error_type (series ErrorType) : The severity level of the message (from the ErrorType enum).
message (series string) : The text of the log message.
active (series bool) : Whether the log should trigger rendering when conditionally evaluated.
INT
A wrapped integer type with attached logging for validation or tracing.
Fields:
v (series int) : The underlying `int` value.
e (Log) : Optional log object describing validation status or error context.
FLOAT
A wrapped float type with attached logging for validation or tracing.
Fields:
v (series float) : The underlying `float` value.
e (Log) : Optional log object describing validation status or error context.
BOOL
A wrapped boolean type with attached logging for validation or tracing.
Fields:
v (series bool) : The underlying `bool` value.
e (Log) : Optional log object describing validation status or error context.
STRING
A wrapped string type with attached logging for validation or tracing.
Fields:
v (series string) : The underlying `string` value.
e (Log) : Optional log object describing validation status or error context.
COLOR
A wrapped color type with attached logging for validation or tracing.
Fields:
v (series color) : The underlying `color` value.
e (Log) : Optional log object describing validation status or error context.
LINE
A wrapped line object with attached logging for validation or tracing.
Fields:
v (series line) : The underlying `line` value.
e (Log) : Optional log object describing validation status or error context.
LABEL
A wrapped label object with attached logging for validation or tracing.
Fields:
v (series label) : The underlying `label` value.
e (Log) : Optional log object describing validation status or error context.
BOX
A wrapped box object with attached logging for validation or tracing.
Fields:
v (series box) : The underlying `box` value.
e (Log) : Optional log object describing validation status or error context.
TABLE
A wrapped table object with attached logging for validation or tracing.
Fields:
v (series table) : The underlying `table` value.
e (Log) : Optional log object describing validation status or error context.
CHART_POINT
A wrapped chart point with attached logging for validation or tracing.
Fields:
v (chart.point) : The underlying `chart.point` value.
e (Log) : Optional log object describing validation status or error context.
POLYLINE
A wrapped polyline object with attached logging for validation or tracing.
Fields:
v (series polyline) : The underlying `polyline` value.
e (Log) : Optional log object describing validation status or error context.
LINEFILL
A wrapped linefill object with attached logging for validation or tracing.
Fields:
v (series linefill) : The underlying `linefill` value.
e (Log) : Optional log object describing validation status or error context.
Error
Real-Time Data Error Check _byMDKTests back if there was missing data/bar with respect to selected timeframe and source.
Experienced red data (no-real time data is available) so i come up with the idea.
Regards.
i.redd.it
[Pandora] Error Function Treasure Trove - ERF/ERFI/Sigmoids+PRAISE:
At this time, I have to graciously thank the wonderful minds behind the new "Pine Profiler Mode" (PPM). Directly prior to this release, it allowed me to ascertain script performance even more. While I usually write mostly in highly optimized Pine code, PPM visually identified a few bottlenecks that would otherwise be hard to identify. Anyone who contributed to PPMs creation and testing before release... BRAVO!!! I commend all of those who assisted in it's state-of-the-art engineering and inception, well done!
BACKSTORY:
This script is specifically being released in defense of another member, an exceptionally unique PhD. It was brought to my attention that a script-mod-event occurred, regarding the publishing of a measly antiquated error function (ERF) calculation within his script. This sadly resulted in the now former member jumping ship after receiving unmannerly responses amidst his curious inquiries as to why his erf() was modded. To forbid rusty and rudimentary formulations because a mod-on-duty is temporally offended by a non-nefarious release of code, is in MY opinion an injustice to principles of perpetuating open-source code intended to benefit thousands to millions of community members. While Pine is the heart and soul of TV, the mathematical concepts contributed from the minds of members is the inspirational fuel of curiosity that powers it's pertinent reason to exist and evolve.
It is an indisputable fact that most members are not greatly skilled Pine Poets. Many members may be incapable of innovating robust function code in Pine, even if they have one or more PhDs. We ALL come from various disciplines of mathematical comprehension and education. Some mathematicians are not greatly skilled at coding, while some coders are not exceptional at math. So... what am I to do to attempt to resolve this circumstantial challenge??? Those who know me best are aware that I will always side with "the right side of history" in order to accomplish my primary self-defined missions I choose to accept. Serving as an algorithmic advocate, I felt compelled to intercede by compiling numerous error functions into elegant code of very high caliber that any and every TV member may choose to employ, so this ERROR never happens again.
After weeks of contemplation into algorithms I knew little about, I prioritized myself to resolve an unanticipated matter by creating advanced formulas of exquisitely crafted error functions refined to the best of my current abilities. My aversion for unresolved problems motivated me to eviscerate error function insufficiencies with many more rigid formulations beyond what is thought to exist. ERF needed a proper algorithmic exorcism anyways. In my furiosity, I contemplated an array of madMAXimum diplomatic demolition methods, choosing the chain saw massacre technique to slaughter dysfunctionalities I encountered on a battered ERF roadway. This resulted in prolific solutions that should assuredly endure the test of time. Poetically, as you will come to see, I am ripping the lid off of Pandora's box of error functions in this case to correct wrongs into a splendid bundle of rights for members.
INTENTION:
Error function (ERF) enthusiasts... PREPARE FOR GLORY!! The specific purpose of this script is to deprecate classic error functions with the creation of a fierce and formidable army of superior formulations, each having varying attributes of computational complexity with differing absolute error ranges in their results for multiple compute scenarios. This is NOT an indicator... It is intended to allow members to embark on endeavors to advance the profound knowledge base of this growing worldwide community of 60+ million inquisitive minds. For those of you who believe computational mathematics and statistics is near completion at its finest; I am here to inform you, this is ridiculous to ponder. We are no where near statistical excellence that can and will exist eventually. At this time, metaphorically speaking, we are merely scratching microns off of the surface of the skin of a statistical apple Isaac Newton once pondered.
THIS RELEASE:
Following weeks of pondering methodical experiments beyond the ordinary, I am liberating these wild notions of my error function explorations to the entire globe as copyleft code, not just Pine. This Pandora's basket of ERFs is being openly disclosed for the sake of the sanctity of mathematics, empirical science (not the garbage we are told by CONTROLocrats to blindly trust), revolutionary cutting edge engineering, cosmology, physics, information technology, artificial intelligence, and EVERY other mathematical branch of human knowledge being discovered over centuries. I do believe James Glaisher would favor my aims concerning ERF aspirations embracing the "Power of Pine".
The included functions are intended for TV members to use in any way they see fit. This is a gift to ALL members to foster future innovative excellence on this platform. Any attempt to moderate this code without notification of "self-evident clear and just cause" will be considered an irrevocable egregious action. The original foundational PURPOSE of establishing script moderation (I clearly remember) was primarily to maintain active vigilance over a growing community against intentional nefarious actions and/or behaviors in blatant disrespect to other author's works AND also thwart rampant copypasting bandit operations, all while accommodating balanced principles of fairness for an educational community cause via open source publishing that should support future algorithmic inventions well beyond my lifespan.
APPLICATIONS:
The related error functions are used in probability theory, statistics, and numerous and engineering scientific disciplines. Its key characteristics and applications are innumerable in computational realms. Its versatility and significance make it a fundamental tool in arenas of quantitative analysis and scientific research...
Probability Theory - Is widely used in probability theory to calculate probabilities and quantiles of the normal distribution.
Statistics - It's related to the Gaussian integral and plays a crucial role in statistics, especially in hypothesis testing and confidence interval calculations.
Physics - In physics, it arises in the study of diffusion equations, quantum mechanics, and heat conduction problems.
Engineering - Applications exist in engineering disciplines such as signal processing, control theory, and telecommunications.
Error Analysis - It's employed in error analysis and uncertainty quantification.
Numeric Approximations - Due to its lack of a closed-form expression, numerical methods are often employed to approximate erf/erfi().
AI, LLMs, & MACHINE LEARNING:
The error function (ERF) is indispensable to various AI applications, particularly due to its relation to Gaussian distributions and error analysis. It is used in Gaussian processes for regression and classification, probabilistic inference for Bayesian networks, soft margin computation in SVMs, neural networks involving Gaussian activation functions or noise, and clustering algorithms like Gaussian Mixture Models. Improved ERF approximations can enhance precision in these applications, reduce computational complexity, handle outliers and noise better, and improve optimization and convergence, possibly leading to more accurate, efficient, and robust AI systems.
BONUS ALGORITHMS:
While ERFs are versatile, its opposite also exists in the form of inverse error functions (ERFIs). I have also included a modified form of the inverse fisher transform along side MY sigmoid (sigmyod). I am uncertain what sigmyod() may be used for, but it's a culmination of my examinations deep into "sigmoid domains", something I am fascinated by. Whatever implications it may possess, I am unveiling it along with it's cousin functions. For curious minds, this quality of composition seen here is ideally what underlies what I would term "Pandora functionality" that empowers my Pandora indication. I go through hordes of formulations, testing, and inspection to find what appears to be the most beneficial logical/mathematical equation to apply...
SCRIPT OPERATION:
To showcase the characteristics and performance of my ERF/ERFI formulations, I devised a multi-modal script. By using bar_index , I generated a broad sequence of numeric values to input into the first ERF/ERFI parameter. These sequences allow you to inspect the contours of the error function's outputs for both ERF and ERFI. When combined with compute-intensive precision functions (CIPFs), the polynomial function output values can be subtracted from my CIPFs to obtain results of absolute error, displaying the accuracy of the many polynomial estimation functions I tuned in testing for Pine's float environment.
A host of numeric input settings are wildly adjustable to inspect values/curvatures across the range of numeric input sequences. Very large numbers, such as Divisor:100,000,100/Offset:200,000,000 for ERF modes or... Divisor:100,000,100/Offset:100,000,000 for ERFI modes, will display miniscule output values calculated from input values in close proximity to 0.0 for the various estimates, similar to a microscope. ERFI approximations very near in proximity to +/-1.0 will always yield large deviations of absolute error. Dragging/zooming your chart or using the Offset input will aid with visually clipping off those ERFI extremes where float precision functions cannot suffice.
NOTICE:
perf() and perfi() are intended for precision computation (as good as it basically gets) in a float environment. However, they are CPU intensive (especially perfi). I wouldn't recommend these being used in ANY Pine script unless it's an "absolute necessity" to do so to accomplish your goal. I only built them to obtain "absolute error curvatures" of the error functions for the polynomial approximations. These are visible in the accuracy modes in the indicator Settings.
LogLibrary "Log"
- Log methods that return input value for code readbility and cleaness.
method str(input)
str
Namespace types: series float, simple float, input float, const float
Parameters:
input (float)
method str(input)
str
Namespace types: series int, simple int, input int, const int
Parameters:
input (int)
method str(input)
str
Namespace types: series bool, simple bool, input bool, const bool
Parameters:
input (bool)
method str(input)
str
Namespace types: series string, simple string, input string, const string
Parameters:
input (string)
method str(input)
str
Namespace types: series linefill
Parameters:
input (linefill)
method str(input)
str
Namespace types: series line
Parameters:
input (line)
method str(input)
str
Namespace types: series box
Parameters:
input (box)
method str(input)
str
Namespace types: series label
Parameters:
input (label)
method str(input)
str
Namespace types: chart.point
Parameters:
input (chart.point)
method str(input)
str
Namespace types: array
Parameters:
input (array)
method str(input)
str
Namespace types: array
Parameters:
input (array)
method str(input)
str
Namespace types: array
Parameters:
input (array)
method str(input)
str
Namespace types: array
Parameters:
input (array)
method str(input)
str
Namespace types: array
Parameters:
input (array)
method str(input)
str
Namespace types: array
Parameters:
input (array)
method str(input)
str
Namespace types: array
Parameters:
input (array)
method str(input)
str
Namespace types: array
Parameters:
input (array)
method str(input)
str
Namespace types: array
Parameters:
input (array)
method str(input)
str
Namespace types: matrix
Parameters:
input (matrix)
method str(input)
str
Namespace types: matrix
Parameters:
input (matrix)
method str(input)
str
Namespace types: matrix
Parameters:
input (matrix)
method str(input)
str
Namespace types: matrix
Parameters:
input (matrix)
method str(input)
str
Namespace types: matrix
Parameters:
input (matrix)
method str(input)
str
Namespace types: matrix
Parameters:
input (matrix)
method str(input)
str
Namespace types: matrix
Parameters:
input (matrix)
method str(input)
str
Namespace types: matrix
Parameters:
input (matrix)
method str(input)
Namespace types: matrix
Parameters:
input (matrix)
method info(input, msg)
Logs the input value with the 'info' log level.
Namespace types: chart.point
Parameters:
input (chart.point) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method info(input, msg)
Logs the input value with the 'info' log level.
Namespace types: series float, simple float, input float, const float
Parameters:
input (float) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method info(input, msg)
Logs the input value with the 'info' log level.
Namespace types: series int, simple int, input int, const int
Parameters:
input (int) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method info(input, msg)
Logs the input value with the 'info' log level.
Namespace types: series bool, simple bool, input bool, const bool
Parameters:
input (bool) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method info(input, msg)
Logs the input value with the 'info' log level.
Namespace types: series string, simple string, input string, const string
Parameters:
input (string) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method info(input, msg)
Logs the input value with the 'info' log level.
Namespace types: series linefill
Parameters:
input (linefill) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method info(input, msg)
Logs the input value with the 'info' log level.
Namespace types: series line
Parameters:
input (line) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method info(input, msg)
Logs the input value with the 'info' log level.
Namespace types: series box
Parameters:
input (box) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method info(input, msg)
Logs the input array with the 'info' log level.
Namespace types: series label
Parameters:
input (label) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method info(input, msg)
Logs the input array with the 'info' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method info(input, msg)
Logs the input array with the 'info' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method info(input, msg)
Logs the input array with the 'info' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method info(input, msg)
Logs the input array with the 'info' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method info(input, msg)
Logs the input array with the 'info' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method info(input, msg)
Logs the input array with the 'info' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method info(input, msg)
Logs the input array with the 'info' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method info(input, msg)
Logs the input array with the 'info' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method info(input, msg)
Logs the input matrix with the 'info' log level.
Namespace types: array
Parameters:
input (array) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method info(input, msg)
Logs the input matrix with the 'info' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method info(input, msg)
Logs the input matrix with the 'info' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method info(input, msg)
Logs the input matrix with the 'info' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method info(input, msg)
Logs the input matrix with the 'info' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method info(input, msg)
Logs the input matrix with the 'info' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method info(input, msg)
Logs the input matrix with the 'info' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method info(input, msg)
Logs the input matrix with the 'info' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method info(input, msg)
Logs the input matrix with the 'info' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method info(input, msg)
Namespace types: matrix
Parameters:
input (matrix)
msg (string)
method warn(input, msg)
Logs the input value with the 'warning' log level.
Namespace types: chart.point
Parameters:
input (chart.point) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method warn(input, msg)
Logs the input value with the 'warning' log level.
Namespace types: series float, simple float, input float, const float
Parameters:
input (float) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method warn(input, msg)
Logs the input value with the 'warning' log level.
Namespace types: series int, simple int, input int, const int
Parameters:
input (int) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method warn(input, msg)
Logs the input value with the 'warning' log level.
Namespace types: series bool, simple bool, input bool, const bool
Parameters:
input (bool) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method warn(input, msg)
Logs the input value with the 'warning' log level.
Namespace types: series string, simple string, input string, const string
Parameters:
input (string) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method warn(input, msg)
Logs the input value with the 'warning' log level.
Namespace types: series linefill
Parameters:
input (linefill) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method warn(input, msg)
Logs the input value with the 'warning' log level.
Namespace types: series line
Parameters:
input (line) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method warn(input, msg)
Logs the input value with the 'warning' log level.
Namespace types: series box
Parameters:
input (box) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method warn(input, msg)
Logs the input array with the 'warning' log level.
Namespace types: series label
Parameters:
input (label) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method warn(input, msg)
Logs the input array with the 'warning' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method warn(input, msg)
Logs the input array with the 'warning' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method warn(input, msg)
Logs the input array with the 'warning' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method warn(input, msg)
Logs the input array with the 'warning' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method warn(input, msg)
Logs the input array with the 'warning' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method warn(input, msg)
Logs the input array with the 'warning' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method warn(input, msg)
Logs the input array with the 'warning' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method warn(input, msg)
Logs the input array with the 'warning' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method warn(input, msg)
Logs the input matrix with the 'warning' log level.
Namespace types: array
Parameters:
input (array) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method warn(input, msg)
Logs the input matrix with the 'warning' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method warn(input, msg)
Logs the input matrix with the 'warning' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method warn(input, msg)
Logs the input matrix with the 'warning' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method warn(input, msg)
Logs the input matrix with the 'warning' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method warn(input, msg)
Logs the input matrix with the 'warning' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method warn(input, msg)
Logs the input matrix with the 'warning' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method warn(input, msg)
Logs the input matrix with the 'warning' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method warn(input, msg)
Logs the input matrix with the 'warning' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method warn(input, msg)
Namespace types: matrix
Parameters:
input (matrix)
msg (string)
method error(input, msg)
Logs the input value with the 'error' log level.
Namespace types: chart.point
Parameters:
input (chart.point) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method error(input, msg)
Logs the input value with the 'error' log level.
Namespace types: series float, simple float, input float, const float
Parameters:
input (float) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method error(input, msg)
Logs the input value with the 'error' log level.
Namespace types: series int, simple int, input int, const int
Parameters:
input (int) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method error(input, msg)
Logs the input value with the 'error' log level.
Namespace types: series bool, simple bool, input bool, const bool
Parameters:
input (bool) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method error(input, msg)
Logs the input value with the 'error' log level.
Namespace types: series string, simple string, input string, const string
Parameters:
input (string) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method error(input, msg)
Logs the input value with the 'error' log level.
Namespace types: series linefill
Parameters:
input (linefill) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method error(input, msg)
Logs the input value with the 'error' log level.
Namespace types: series line
Parameters:
input (line) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method error(input, msg)
Logs the input value with the 'error' log level.
Namespace types: series box
Parameters:
input (box) : The input value to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input value.
method error(input, msg)
Logs the input array with the 'error' log level.
Namespace types: series label
Parameters:
input (label) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method error(input, msg)
Logs the input array with the 'error' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method error(input, msg)
Logs the input array with the 'error' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method error(input, msg)
Logs the input array with the 'error' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method error(input, msg)
Logs the input array with the 'error' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method error(input, msg)
Logs the input array with the 'error' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method error(input, msg)
Logs the input array with the 'error' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method error(input, msg)
Logs the input array with the 'error' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method error(input, msg)
Logs the input array with the 'error' log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input array.
method error(input, msg)
Logs the input matrix with the 'error' log level.
Namespace types: array
Parameters:
input (array) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method error(input, msg)
Logs the input matrix with the 'error' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method error(input, msg)
Logs the input matrix with the 'error' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method error(input, msg)
Logs the input matrix with the 'error' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method error(input, msg)
Logs the input matrix with the 'error' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method error(input, msg)
Logs the input matrix with the 'error' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method error(input, msg)
Logs the input matrix with the 'error' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method error(input, msg)
Logs the input matrix with the 'error' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method error(input, msg)
Logs the input matrix with the 'error' log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
Returns: The input matrix.
method error(input, msg)
Namespace types: matrix
Parameters:
input (matrix)
msg (string)
method log(input, msg, level)
Logs the input value with the specified log level.
Namespace types: chart.point
Parameters:
input (chart.point) : The input value to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input value.
method log(input, msg, level)
Logs the input value with the specified log level.
Namespace types: series float, simple float, input float, const float
Parameters:
input (float) : The input value to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input value.
method log(input, msg, level)
Logs the input value with the specified log level.
Namespace types: series int, simple int, input int, const int
Parameters:
input (int) : The input value to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input value.
method log(input, msg, level)
Logs the input value with the specified log level.
Namespace types: series bool, simple bool, input bool, const bool
Parameters:
input (bool) : The input value to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input value.
method log(input, msg, level)
Logs the input value with the specified log level.
Namespace types: series string, simple string, input string, const string
Parameters:
input (string) : The input value to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input value.
method log(input, msg, level)
Logs the input value with the specified log level.
Namespace types: series linefill
Parameters:
input (linefill) : The input value to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input value.
method log(input, msg, level)
Logs the input value with the specified log level.
Namespace types: series line
Parameters:
input (line) : The input value to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input value.
method log(input, msg, level)
Logs the input value with the specified log level.
Namespace types: series box
Parameters:
input (box) : The input value to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input value.
method log(input, msg, level)
Logs the input array with the specified log level.
Namespace types: series label
Parameters:
input (label) : The input array to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input array.
method log(input, msg, level)
Logs the input array with the specified log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input array.
method log(input, msg, level)
Logs the input array with the specified log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input array.
method log(input, msg, level)
Logs the input array with the specified log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input array.
method log(input, msg, level)
Logs the input array with the specified log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input array.
method log(input, msg, level)
Logs the input array with the specified log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input array.
method log(input, msg, level)
Logs the input array with the specified log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input array.
method log(input, msg, level)
Logs the input array with the specified log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input array.
method log(input, msg, level)
Logs the input array with the specified log level.
Namespace types: array
Parameters:
input (array) : The input array to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input array.
method log(input, msg, level)
Logs the input matrix with the specified log level.
Namespace types: array
Parameters:
input (array) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input matrix.
method log(input, msg, level)
Logs the input matrix with the specified log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input matrix.
method log(input, msg, level)
Logs the input matrix with the specified log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input matrix.
method log(input, msg, level)
Logs the input matrix with the specified log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input matrix.
method log(input, msg, level)
Logs the input matrix with the specified log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input matrix.
method log(input, msg, level)
Logs the input matrix with the specified log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input matrix.
method log(input, msg, level)
Logs the input matrix with the specified log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input matrix.
method log(input, msg, level)
Logs the input matrix with the specified log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input matrix.
method log(input, msg, level)
Logs the input matrix with the specified log level.
Namespace types: matrix
Parameters:
input (matrix) : The input matrix to log.
msg (string) : The message to log. Default is an empty string.
level (int) : The log level (1 - info, 2 - warning, 3 - error). Default is 1.
Returns: The input matrix.
method log(input, msg, level)
Namespace types: matrix
Parameters:
input (matrix)
msg (string)
level (int)
Root mean squared error range (RMSER)Similarly to Bollinger bands, the RMSER gives a support and resistance areas for the trading price. Unlike bollinger bands, which use standard deviation, this support and resistance is calculated with 2 * the root mean squared error away from the moving average. This works very well with indices, like $SPX, and prices only fall outside the range during black swan events like the 2020 crash.
Ehlers Average Error Filter [CC]The Average Error Filter was created by John Ehlers and this is a variation of a Zero Lag Exponential Moving Average that uses a Super Smoother to filter out the noise and then uses a second Super Smoother of the difference between the current price and the filtered data. This works well as a trendline and does give out a few false signals like all indicators inevitably do but most signals do a good job of keeping up with the trend and providing clear entries and exits when the trend changes. I have included strong buy and sell signals in addition to normal ones so like always darker colors are strong signals and lighter colors are normal ones. Buy when the line turns green and sell when it turns red.
Let me know if there are any other scripts you would like to see me publish!
Ehlers Error Correcting Exponential Moving Average [CC]The Error Correcting Exponential Moving Average was created by John Ehlers and Ric Way (Stocks & Commodities V. 28:11 (30-35)) and this is an excellent moving average that accurately identifies the trend and sticks with the price during trends or choppy periods pretty well. It looks back to find the best gain setting for each day that returns the smallest difference between the current price and the ema based on the gain setting and uses that day's info in it's total calculations and if there is a zero gain for the day then it is just a classic ema. I have included strong buy and sell signals in addition to normal ones so lighter colors are normal and darker colors are strong. Buy when the line turns green and sell when it turns red.
Let me know if there are any other indicators you would like to see me publish!
Barssince Context TestThis is just published for visibility as a public service until the Pine devs are able to fix or document this behavior. The barssince() function returns different values when inside a conditional context. As long as it can be documented (and relied upon), this could be a pretty cool feature, but right now this is now how I read the help documentation to describe the function's intended behavior.
Anyway, in the script you'll see that test and test2 agree on red bars, but on green bars test gets a much lower value, which was pretty shocking to me until I traced down this particular cause within my larger script.
Return Error With Reference & Constant Value Enforcer FunctionsI found MichelT 's work thanks to LucF . One of its cool concepts that touched me was his error's function. Whenever something unexpected takes place, it returns an error's message right on the chart, one nobody can't say they can't see lol. I told him it would be cool if we could get specific messages related to specific cases, he said "there is a task for such feature". On the meantime I wanted to enrich his feature by making the function printing any number the user wants.
Another really cool thing I have been in love with are "Pine Coding Conventions", I can't express enough how thankful I am to the amazing team behind it. Just recently they introduced me to a new rule, one seeming very popular across the board, using all capital letters to define a constant value.
On this script I combined both error's printing message with a constant check functions that enforce the value must remain unchanged ever. I hope you like this work, I really enjoy seeing brilliant people coming up with some awesome ideas. Let's together make "Pine" a more cooler language.
Dual Thrust Trading Algorithm (ps4)This is an PS4 update to the popular Dual Thrust trading algorithm posted by me some time ago (). It has been commonly used in futures, Forex and equity markets. The idea of Dual Thrust is similar to a typical breakout system, however dual thrust uses the historical price to construct update the look back period - theoretically making it more stable in any given period.
See: www.quantconnect.com
[RS]Function - Minkowski_distancecopy pasted description..
Minkowski distance is a metric in a normed vector space. Minkowski distance is used for distance similarity of vector. Given two or more vectors, find distance similarity of these vectors.
