Support_Resistance.pine

//@version=5
// support/resistance dynamically.
indicator("Swing Highs and Lows", overlay=true)


length = input.int(5, "Swing Length", minval=1)


isSwingHigh(len) =>
    ta.pivothigh(high, len, len) != na

isSwingLow(len) =>
    ta.pivotlow(low, len, len) != na

sHigh = ta.pivothigh(high, length, length)
sLow  = ta.pivotlow(low, length, length)


plotshape(not na(sHigh), title="Swing High", style=shape.triangledown, location=location.abovebar, color=color.red, size=size.tiny)
plotshape(not na(sLow),  title="Swing Low",  style=shape.triangleup,   location=location.belowbar, color=color.green, size=size.tiny)


var line shLine = na
var line slLine = na

if not na(sHigh)
    shLine := line.new(bar_index - length, sHigh, bar_index, sHigh, color=color.red, width=1)
if not na(sLow)
    slLine := line.new(bar_index - length, sLow, bar_index, sLow, color=color.green, width=1)