How can i get the value of previous highest high in pinescript?

Question

trying to get the value of the previous highest high in pinescript, but this code gives me the previous bar of current highest high.

myper=input(50, "LENGTH")
y1 = highest(high,myper)
yy = valuewhen(high>y1[1],high,0)
plot(yy[1], linewidth=2, color=#00FF00, title="alt")

Can anyone help ?

Answer 1

Thats because you use the previous value ([1]) of the yy series in plot() function.

//@version=4
study("My Script")
myper=input(50, "LENGTH")
y1 = highest(high,myper)
yy = valuewhen(high>y1[1],high,0)
plot(yy, linewidth=2, color=#00FF00, title="alt")