Smart Lines

//version=6
indicator('Smart Lines', overlay = true)

// Variables to track line objects and colors
var line verticalLine = na
var line horizontalLineLow = na
var line horizontalLineHigh = na
var color lineColor = na

// Determine line color based on price change
if close > close[1]
lineColor := color.green
lineColor
else if close < close[1]
lineColor := color.red
lineColor
else
lineColor := color.gray
lineColor

// Draw vertical line at current bar's open
if bar_index != bar_index[1]
line.delete(verticalLine)
verticalLine := line.new(bar_index, low, bar_index, high, color = lineColor, width = 2)

// Draw horizontal line at previous bar's low
if bar_index != bar_index[1]
line.delete(horizontalLineLow)
horizontalLineLow := line.new(bar_index[1], low[1], bar_index, low[1], color = lineColor, width = 2, extend = extend.right)

// Draw horizontal line at previous bar's high
if bar_index != bar_index[1]
line.delete(horizontalLineHigh)
horizontalLineHigh := line.new(bar_index[1], high[1], bar_index, high[1], color = lineColor, width = 2, extend = extend.right)