Pine script - plot only once after buy condition is met

Question

I have a pine script that plots flag shape when a target is met after a buy condition. The problem is it plots every subsequent target for the same buy condition. Does anyone have a script that would plot a target only once for that particular buy condition?

Answer 1

You need to store condition for plotting in some var variable:

var plot_condition = 0
plot_condition := 0

if buy_condition
    ....
    plot_condition := 1

plot(plot_condition? data : na, style = shape.xcross)