//@version=6
indicator("Workshop 07 Latest Bullish Gap", overlay=true)
minimum = input.int(1, "Minimum gap ticks", minval=1)
width = minimum * syminfo.mintick
found = barstate.isconfirmed and low > high[2] + width
var float bottom = na
var float top = na
var int created = na
if found
    bottom := high[2]
    top := low
    created := bar_index
touched = (not na(top) and bar_index > created and
    low <= top and high >= bottom)
failed = (not na(bottom) and close < bottom and
    barstate.isconfirmed)
plot(top, "Latest upper edge", color=color.blue,
    style=plot.style_stepline)
plot(bottom, "Latest lower edge", color=color.gray,
    style=plot.style_stepline)
plotshape(touched and barstate.isconfirmed, "Overlap",
    shape.circle, location.belowbar, color=color.orange,
    size=size.tiny)
plotshape(failed, "Close below zone", shape.xcross,
    location.abovebar, color=color.red, size=size.tiny)