Library "chrono_utils" Collection of objects and common functions that are related to datetime windows session days and time ranges. The main purpose of this library is to handle time-related functionality and make it easy to reason about a future bar checking if it will be part of a predefined session and/or inside a datetime window. All existing session functionality I found in the documentation e.g. "not na(time(timeframe, session, timezone))" are not suitable for strategy scripts, since the execution of the orders is delayed by one bar, due to the script execution happening at the bar close. Moreover, a history operator with a negative value that looks forward is not allowed in any pinescript expression. So, a prediction for the next bar using the bars_back argument of "time()"" and "time_close()" was necessary. Thus, I created this library to overcome this small but very important limitation. In the meantime, I added useful functionality to handle session-based behavior. An interesting utility that emerged from this development is the data anomaly detection where a comparison between the prediction and the actual value is happening. If those two values are different then a data inconsistency happened between the prediction bar and the actual bar (probably due to a holiday, half session day, a timezone change etc..)
exTimezone(timezone) exTimezone - Convert extended timezone to timezone string Parameters: timezone (simple string): - The timezone or a special string Returns: string representing the timezone
nameOfDay(day) nameOfDay - Convert the day id into a short nameOfDay Parameters: day (int): - The day id to convert Returns: - The short name of the day
today() today - Get the day id of this day Returns: - The day id
nthDayAfter(day, n) nthDayAfter - Get the day id of n days after the given day Parameters: day (int): - The day id of the reference day n (int): - The number of days to go forward Returns: - The day id of the day that is n days after the reference day
nextDayAfter(day) nextDayAfter - Get the day id of next day after the given day Parameters: day (int): - The day id of the reference day Returns: - The day id of the next day after the reference day
nthDayBefore(day, n) nthDayBefore - Get the day id of n days before the given day Parameters: day (int): - The day id of the reference day n (int): - The number of days to go forward Returns: - The day id of the day that is n days before the reference day
prevDayBefore(day) prevDayBefore - Get the day id of previous day before the given day Parameters: day (int): - The day id of the reference day Returns: - The day id of the previous day before the reference day
tomorrow() tomorrow - Get the day id of the next day Returns: - The next day day id
normalize(num, min, max) normalizeHour - Check if number is inthe range of [min, max] Parameters: num (int) min (int) max (int) Returns: - The normalized number
normalizeHour(hourInDay) normalizeHour - Check if hour is valid and return a noralized hour range from [0, 24] Parameters: hourInDay (int) Returns: - The normalized hour
normalizeMinute(minuteInHour) normalizeMinute - Check if minute is valid and return a noralized minute from [0, 59] Parameters: minuteInHour (int) Returns: - The normalized minute
monthInMilliseconds(mon) monthInMilliseconds - Calculate the miliseconds in one bar of the timeframe Parameters: mon (int): - The month of reference to get the miliseconds Returns: - The number of milliseconds of the month
barInMilliseconds() barInMilliseconds - Calculate the miliseconds in one bar of the timeframe Returns: - The number of milliseconds in one bar
method to_string(this) to_string - Formats the time window into a human-readable string Namespace types: DateTimeWindow Parameters: this (DateTimeWindow): - The time window object with the from and to datetimes Returns: - The string of the time window
method to_string(this) to_string - Formats the session days into a human-readable string with short day names Namespace types: SessionDays Parameters: this (SessionDays): - The session days object with the day selection Returns: - The string of the session day short names
method to_string(this) to_string - Formats the session time into a human-readable string Namespace types: SessionTime Parameters: this (SessionTime): - The session time object with the hour and minute of the time of the day Returns: - The string of the session time
method to_string(this) to_string - Formats the session time into a human-readable string Namespace types: SessionTimeRange Parameters: this (SessionTimeRange): - The session time range object with the start and end time of the daily session Returns: - The string of the session time
method to_string(this) to_string - Formats the session into a human-readable string Namespace types: Session Parameters: this (Session): - The session object with the day and the time range selection Returns: - The string of the session
method init(this, fromDateTime, toDateTime) init - Initialize the time window object from boolean values of each session day Namespace types: DateTimeWindow Parameters: this (DateTimeWindow): - The time window object that will hold the from and to datetimes fromDateTime (int): - The starting datetime of the time window toDateTime (int): - The ending datetime of the time window Returns: - The time window object
method init(this, refTimezone, chTimezone, fromDateTime, toDateTime) init - Initialize the time window object from boolean values of each session day Namespace types: DateTimeWindow Parameters: this (DateTimeWindow): - The time window object that will hold the from and to datetimes refTimezone (simple string): - The timezone of reference of the 'from' and 'to' dates chTimezone (simple string): - The target timezone to convert the 'from' and 'to' dates fromDateTime (int): - The starting datetime of the time window toDateTime (int): - The ending datetime of the time window Returns: - The time window object
method init(this, sun, mon, tue, wed, thu, fri, sat) init - Initialize the session days object from boolean values of each session day Namespace types: SessionDays Parameters: this (SessionDays): - The session days object that will hold the day selection sun (bool): - Is Sunday a trading day? mon (bool): - Is Monday a trading day? tue (bool): - Is Tuesday a trading day? wed (bool): - Is Wednesday a trading day? thu (bool): - Is Thursday a trading day? fri (bool): - Is Friday a trading day? sat (bool): - Is Saturday a trading day? Returns: - The session days object
method init(this, unixTime) init - Initialize the object from the hour and minute of the session time in exchange timezone (syminfo.timezone) Namespace types: SessionTime Parameters: this (SessionTime): - The session time object with the hour and minute of the time of the day unixTime (int): - The unix time Returns: - The session time object
method init(this, hourInDay, minuteInHour) init - Initialize the object from the hour and minute of the session time in exchange timezone (syminfo.timezone) Namespace types: SessionTime Parameters: this (SessionTime): - The session time object with the hour and minute of the time of the day hourInDay (int): - The hour of the time minuteInHour (int): - The minute of the time Returns: - The session time object
method init(this, hourInDay, minuteInHour, refTimezone) init - Initialize the object from the hour and minute of the session time Namespace types: SessionTime Parameters: this (SessionTime): - The session time object with the hour and minute of the time of the day hourInDay (int): - The hour of the time minuteInHour (int): - The minute of the time refTimezone (string): - The timezone of reference of the 'hour' and 'minute' Returns: - The session time object
method init(this, startTime, endTime) init - Initialize the object from the start and end session time in exchange timezone (syminfo.timezone) Namespace types: SessionTimeRange Parameters: this (SessionTimeRange): - The session time range object that will hold the start and end time of the daily session startTime (SessionTime): - The time the session begins endTime (SessionTime): - The time the session ends Returns: - The session time range object
method init(this, startTimeHour, startTimeMinute, endTimeHour, endTimeMinute, refTimezone) init - Initialize the object from the start and end session time Namespace types: SessionTimeRange Parameters: this (SessionTimeRange): - The session time range object that will hold the start and end time of the daily session startTimeHour (int): - The time hour the session begins startTimeMinute (int): - The time minute the session begins endTimeHour (int): - The time hour the session ends endTimeMinute (int): - The time minute the session ends refTimezone (string) Returns: - The session time range object
method init(this, days, timeRanges) init - Initialize the session object from session days and time range Namespace types: Session Parameters: this (Session): - The session object that will hold the day and the time range selection days (SessionDays): - The session days object that defines the days the session is happening timeRanges (array<SessionTimeRange>): - The array of all the session time ranges during a session day Returns: - The session object
method init(this, days, timeRanges, names, colors) init - Initialize the session object from session days and time range Namespace types: SessionView Parameters: this (SessionView): - The session view object that will hold the session, the names and the color selections days (SessionDays): - The session days object that defines the days the session is happening timeRanges (array<SessionTimeRange>): - The array of all the session time ranges during a session day names (array<string>): - The array of the names of the sessions colors (array<color>): - The array of the colors of the sessions Returns: - The session object
method get_size_in_secs(this) get_size_in_secs - Count the seconds from start to end in the given timeframe Namespace types: DateTimeWindow Parameters: this (DateTimeWindow): - The time window object with the from and to datetimes Returns: - The number of seconds inside the time widow for the given timeframe
method get_size_in_secs(this) get_size_in_secs - Calculate the seconds inside the session Namespace types: SessionTimeRange Parameters: this (SessionTimeRange): - The session time range object with the start and end time of the daily session Returns: - The number of seconds inside the session
method get_size_in_bars(this) get_size_in_bars - Count the bars from start to end in the given timeframe Namespace types: DateTimeWindow Parameters: this (DateTimeWindow): - The time window object with the from and to datetimes Returns: - The number of bars inside the time widow for the given timeframe
method get_size_in_bars(this) get_size_in_bars - Calculate the bars inside the session Namespace types: SessionTimeRange Parameters: this (SessionTimeRange): - The session time range object with the start and end time of the daily session Returns: - The number of bars inside the session for the given timeframe
method is_bar_included(this, offset_forward) is_bar_included - Check if the given bar is between the start and end dates of the window Namespace types: DateTimeWindow Parameters: this (DateTimeWindow): - The time window object with the from and to datetimes offset_forward (simple int): - The number of bars forward. Default is 1 Returns: - Whether the current bar is inside the datetime window
method is_bar_included(this, offset_forward) is_bar_included - Check if the given bar is inside the session as defined by the input params (what "not na(time(timeframe.period, this.to_sess_string())[-1])" should return if you could write it Namespace types: Session Parameters: this (Session): - The session with the day and the time range selection offset_forward (simple int): - The bar forward to check if it is between the from and to datetimes. Default is 1 Returns: - Whether the current time is inside the session
method to_sess_string(this) to_sess_string - Formats the session days into a session string with day ids Namespace types: SessionDays Parameters: this (SessionDays): - The session days object Returns: - The string of the session day ids
method to_sess_string(this) to_sess_string - Formats the session time into a session string Namespace types: SessionTime Parameters: this (SessionTime): - The session time object with the hour and minute of the time of the day Returns: - The string of the session time
method to_sess_string(this) to_sess_string - Formats the session time into a session string Namespace types: SessionTimeRange Parameters: this (SessionTimeRange): - The session time range object with the start and end time of the daily session Returns: - The string of the session time
method to_sess_string(this) to_sess_string - Formats the session into a session string Namespace types: Session Parameters: this (Session): - The session object with the day and the time range selection Returns: - The string of the session
method from_sess_string(this, sess) from_sess_string - Initialize the session days object from the session string Namespace types: SessionDays Parameters: this (SessionDays): - The session days object that will hold the day selection sess (string): - The session string part that represents the days [1-7] Returns: - The session days object
method from_sess_string(this, sess) from_sess_string - Initialize the session time object from the session string in exchange timezone (syminfo.timezone) Namespace types: SessionTime Parameters: this (SessionTime): - The session time object that will hold the hour and minute of the time sess (string): - The session string part that represents the time HHmm Returns: - The session time object
method from_sess_string(this, sess, refTimezone) from_sess_string - Initialize the session time object from the session string Namespace types: SessionTime Parameters: this (SessionTime): - The session time object that will hold the hour and minute of the time sess (string): - The session string part that represents the time HHmm refTimezone (simple string): - The timezone of reference of the 'hour' and 'minute' Returns: - The session time object
method from_sess_string(this, sess) from_sess_string - Initialize the session time range object from the session string in exchange timezone (syminfo.timezone) Namespace types: SessionTimeRange Parameters: this (SessionTimeRange): - The session time range object that will hold the start and end time of the daily session sess (string): - The session string part that represents the time range HHmm-HHmm Returns: - The session time range object
method from_sess_string(this, sess, refTimezone) from_sess_string - Initialize the session time range object from the session string Namespace types: SessionTimeRange Parameters: this (SessionTimeRange): - The session time range object that will hold the start and end time of the daily session sess (string): - The session string part that represents the time range HHmm-HHmm refTimezone (simple string): - The timezone of reference of the time ranges Returns: - The session time range object
method from_sess_string(this, sess) from_sess_string - Initialize the session object from the session string in exchange timezone (syminfo.timezone) Namespace types: Session Parameters: this (Session): - The session object that will hold the day and the time range selection sess (string): - The session string that represents the session HHmm-HHmm,HHmm-HHmm:ddddddd Returns: - The session time range object
method from_sess_string(this, sess, refTimezone) from_sess_string - Initialize the session object from the session string Namespace types: Session Parameters: this (Session): - The session object that will hold the day and the time range selection sess (string): - The session string that represents the session HHmm-HHmm,HHmm-HHmm:ddddddd refTimezone (simple string): - The timezone of reference of the time ranges Returns: - The session time range object
method nth_day_after(this, day, n) nth_day_after - The nth day after the given day that is a session day (true) in the object Namespace types: SessionDays Parameters: this (SessionDays): - The session days object with the day selection day (int): - The day id of the reference day n (int): - The number of days after Returns: - The day id of the nth session day of the week after the given day
method nth_day_before(this, day, n) nth_day_before - The nth day before the given day that is a session day (true) in the object Namespace types: SessionDays Parameters: this (SessionDays): - The session days object with the day selection day (int): - The day id of the reference day n (int): - The number of days after Returns: - The day id of the nth session day of the week before the given day
method next_day(this) next_day - The next day that is a session day (true) in the object Namespace types: SessionDays Parameters: this (SessionDays): - The session days object with the day selection Returns: - The day id of the next session day of the week
method previous_day(this) previous_day - The previous day that is session day (true) in the object Namespace types: SessionDays Parameters: this (SessionDays): - The session days object with the day selection Returns: - The day id of the previous session day of the week
method get_sec_in_day(this) get_sec_in_day - Count the seconds since the start of the day this session time represents Namespace types: SessionTime Parameters: this (SessionTime): - The session time object with the hour and minute of the time of the day Returns: - The number of seconds passed from the start of the day until that session time
method get_ms_in_day(this) get_ms_in_day - Count the milliseconds since the start of the day this session time represents Namespace types: SessionTime Parameters: this (SessionTime): - The session time object with the hour and minute of the time of the day Returns: - The number of milliseconds passed from the start of the day until that session time
method is_day_included(this, day) is_day_included - Check if the given day is inside the session days Namespace types: SessionDays Parameters: this (SessionDays): - The session days object with the day selection day (int): - The day to check if it is a trading day Returns: - Whether the current day is included in the session days
DateTimeWindow DateTimeWindow - Object that represents a datetime window with a beginning and an end Fields: fromDateTime (series int): - The beginning of the datetime window toDateTime (series int): - The end of the datetime window
SessionDays SessionDays - Object that represent the trading days of the week Fields: days (map<int, bool>): - The map that contains all days of the week and their session flag
SessionTime SessionTime - Object that represents the time (hour and minutes) Fields: hourInDay (series int): - The hour of the day that ranges from 0 to 24 minuteInHour (series int): - The minute of the hour that ranges from 0 to 59 minuteInDay (series int): - The minute of the day that ranges from 0 to 1440. They will be calculated based on hourInDay and minuteInHour when method is called
SessionTimeRange SessionTimeRange - Object that represents a range that extends from the start to the end time Fields: startTime (SessionTime): - The beginning of the time range endTime (SessionTime): - The end of the time range isOvernight (series bool): - Whether or not this is an overnight time range
Session Session - Object that represents a session Fields: days (SessionDays): - The map of the trading days timeRanges (array<SessionTimeRange>): - The array with all time ranges of the session during the trading days
SessionView SessionView - Object that visualize a session Fields: sess (Session): - The Session object to be visualized names (array<string>): - The names of the session time ranges colors (array<color>): - The colors of the session time ranges
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