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plotlinepointpine-script

How to plot a line between 2 points

i use this script to find highs and lows: https://www.tradingview.com/script/eH0vkSBy-Swing-Highs-and-Lows/. I want to plot a line between two last points(2 swing highs or 2 swing lows) so that in the future, if price close above/under line i get an entry signal. One more nuance - i use renko bars. How i can do this? Something like that:

strategy(title='My first strategy')
//code provided in the link
prhigh=valuewhen(isSwingHigh,high,0)
l = line.new(barindex, prhigh, barindex[1], prhigh[1], width = 4)// I don't know how to get barindex
alertcondition(crossover(l,close), 'Swing High', 'New SwingHigh')

enter image description here

Solution

  • There are numerous scripts that aim to draw lines from swing high's swing low's.

    https://www.tradingview.com/script/CtjX82Hp-Extrapolated-Pivot-Connector-Lets-Make-Support-And-Resistances/

    However remember that you can't create alerts involving a series interacting with a line object, as this one don't have numerical values.

    One option to get a line connecting two values without using line.new is to use plot(isSwingHigh ? close : na), when you plot a series containing na values plot will connect the two last non na values with a line.