indicator · on price · open source

Break of Structure (BOS)

Deepwick · @deepwickv1Updated 2 Oct 2026▲ 0 users

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About

Break of Structure (BOS) marks the bar where price takes out the previous swing high (bullish) or swing low (bearish) in the direction of the prevailing trend.

Bullish BOS = new high beyond the last swing high; bearish BOS = new low beyond the last swing low.
Triangles plot on break; an optional confirmClose filter requires the candle to close beyond the level.
Use BOS, not random breakouts, to align with smart-money positioning.

Source code

//@version=5
indicator("Break of Structure (BOS)", overlay=true)
swing = input.int(5, "Swing Length", minval=2, maxval=50)
confirmClose = input.bool(true, "Confirm on Close")
ph = ta.pivothigh(high, swing, swing)
pl = ta.pivotlow(low, swing, swing)
var float lastPh = na
var float lastPl = na
if not na(ph)
    lastPh := ph
if not na(pl)
    lastPl := pl
bosUp = confirmClose ? close > lastPh : high > lastPh
bosDn = confirmClose ? close < lastPl : low < lastPl
bosUp := bosUp and not bosUp[1]
bosDn := bosDn and not bosDn[1]
plotshape(bosUp, "Bullish BOS", style=shape.triangleup, location=location.belowbar, color=color.green, text="BOS")
plotshape(bosDn, "Bearish BOS", style=shape.triangledown, location=location.abovebar, color=color.red, text="BOS")
alertcondition(bosUp, "Bullish BOS", "Bullish Break of Structure")
alertcondition(bosDn, "Bearish BOS", "Bearish Break of Structure")

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