//@version=6
indicator("IMG 30 — Confirmed Level Audit", overlay=true)
// Levels begin on the knowledge bar, never backdated to the pivot.
int leftBars = input.int(3, "Bars left", minval=1)
int rightBars = input.int(3, "Bars right", minval=1)
float ph = ta.pivothigh(high, leftBars, rightBars)
float pl = ta.pivotlow(low, leftBars, rightBars)
var float lastHigh = na
var float lastLow = na
bool highKnown = barstate.isconfirmed and not na(ph)
bool lowKnown = barstate.isconfirmed and not na(pl)
if highKnown
    lastHigh := ph
if lowKnown
    lastLow := pl
plot(lastHigh, "Confirmed high reference", color=color.black, style=plot.style_stepline)
plot(lastLow, "Confirmed low reference", color=color.gray, style=plot.style_stepline)
plotshape(highKnown, "High becomes known", shape.circle, location.abovebar, color.black, size=size.tiny)
plotshape(lowKnown, "Low becomes known", shape.circle, location.belowbar, color.gray, size=size.tiny)