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//@version=5
indicator("Liquidity Sweep Detector", overlay=true, max_bars_back=500)

// --- Inputs ---
leftBars  = input.int(5, title="Pivot Left Bars", tooltip="Number of bars to the left to define a swing point")
rightBars = input.int(5, title="Pivot Right Bars", tooltip="Number of bars to the right to define a swing point")

// --- Calculate Pivots ---
// We use ta.pivothigh and ta.pivotlow to establish structural levels
ph = ta.pivothigh(high, leftBars, rightBars)
pl = ta.pivotlow(low, leftBars, rightBars)

// Variables to store the most recent validated pivot levels
var float lastHigh = na
var float lastLow = na

if not na(ph)
    lastHigh := ph
if not na(pl)
    lastLow := pl

// --- Sweep Detection Logic ---
// Bearish Sweep: Price wicks above the last known swing high, but the candle closes below it.
bearishSweep = not na(lastHigh) and high > lastHigh and close < lastHigh

// Bullish Sweep: Price wicks below the last known swing low, but the candle closes above it.
bullishSweep = not na(lastLow) and low < lastLow and close > lastLow

// --- Plotting ---
// Mark the underlying structural pivots (offset backwards to align with the actual pivot bar)
plotshape(not na(ph), title="Swing High", style=shape.triangledown, location=location.abovebar, color=color.new(color.gray, 50), size=size.tiny, offset=-rightBars)
plotshape(not na(pl), title="Swing Low", style=shape.triangleup, location=location.belowbar, color=color.new(color.gray, 50), size=size.tiny, offset=-rightBars)

// Highlight the actual liquidity sweeps in real-time
plotshape(bearishSweep, title="Bearish Sweep", text="Sweep", style=shape.labeldown, location=location.abovebar, color=color.new(color.red, 0), textcolor=color.white, size=size.small)
plotshape(bullishSweep, title="Bullish Sweep", text="Sweep", style=shape.labelup, location=location.belowbar, color=color.new(color.green, 0), textcolor=color.white, size=size.small)

// Draw lines projecting the last pivot levels
var line highLine = na
var line lowLine = na

if not na(ph)
    line.delete(highLine)
    highLine := line.new(bar_index[rightBars], ph, bar_index, ph, color=color.red, style=line.style_dashed)

if not na(pl)
    line.delete(lowLine)
    lowLine := line.new(bar_index[rightBars], pl, bar_index, pl, color=color.green, style=line.style_dashed)
    
// Extend lines dynamically
if na(ph) and not na(highLine)
    line.set_x2(highLine, bar_index)
if na(pl) and not na(lowLine)
    line.set_x2(lowLine, bar_index)