// This Pine Script® code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © AI_PIPS

//@version=6
indicator("AIPIPS Liquidity Sweep Detector", overlay=true, max_lines_count=300, max_labels_count=300)

lookback = input.int(5, "Swing lookback", minval=1)
tolerancePct = input.float(0.05, "Equal level tolerance (%)", step=0.01, minval=0.01)
showSweepsOnly = input.bool(false, "Only highlight sweeps")

pctDiff(a, b) => math.abs(a - b) / nz(b == 0.0 ? na : b, a) * 100

ph = ta.pivothigh(high, lookback, lookback)
pl = ta.pivotlow(low, lookback, lookback)
prevPH = ta.valuewhen(not na(ph), ph, 1)
prevPL = ta.valuewhen(not na(pl), pl, 1)

isEqualHigh = not na(ph) and not na(prevPH) and pctDiff(ph, prevPH) <= tolerancePct
isEqualLow = not na(pl) and not na(prevPL) and pctDiff(pl, prevPL) <= tolerancePct

sweptHigh = isEqualHigh[1] and high > nz(prevPH[1])
sweptLow = isEqualLow[1] and low < nz(prevPL[1])

plotshape(isEqualHigh and not showSweepsOnly, title="Equal High", style=shape.triangledown, color=color.orange, offset=-lookback, text="EQH")
plotshape(isEqualLow and not showSweepsOnly, title="Equal Low", style=shape.triangleup, color=color.teal, offset=-lookback, text="EQL")

plotshape(sweptHigh, title="Liquidity Grab High", style=shape.labeldown, color=color.new(color.red, 0), text="Sweep↑", location=location.abovebar)
plotshape(sweptLow, title="Liquidity Grab Low", style=shape.labelup, color=color.new(color.green, 0), text="Sweep↓", location=location.belowbar)

bgcolor(sweptHigh ? color.new(color.red, 90) : sweptLow ? color.new(color.green, 90) : na)