Volume Profile Trading Signals: Complete TradingView Guide

//@version=5
indicator("Volume Profile Trading Signals", overlay=true, max_labels_count=50)

// === Inputs ===
lookback = input.int(48, "Lookback Period (bars)", minval=8)
numRows = input.int(24, "Number of Rows", minval=8, maxval=48)
valueAreaPct = input.int(70, "Value Area %", minval=50, maxval=90)
showPOC = input.bool(true, "Show POC Line")
showVA = input.bool(true, "Show Value Area")
showHVN = input.bool(true, "Show High Volume Nodes")
showLVN = input.bool(true, "Show Low Volume Nodes")

// === Volume Profile Calculation ===
var float pocPrice = na
var float vahPrice = na
var float valPrice = na

calcVolumeProfile() =>
    float[] prices = array.new<float>(0)
    float[] volumes = array.new<float>(0)
    float totalVol = 0.0

    for i = 0 to lookback - 1
        barVol = volume[i]
        if barVol > 0
            array.push(prices, (high[i] + low[i]) / 2)
            array.push(volumes, barVol)
            totalVol += barVol

    // Sort by price
    // Simplified: use average price bins
    float step = (ta.highest(high, lookback) - ta.lowest(low, lookback)) / numRows
    float[] binVols = array.new<float>(numRows, 0.0)
    float[] binPrices = array.new<float>(numRows, 0.0)

    float lowestPrice = ta.lowest(low, lookback)
    for j = 0 to numRows - 1
        float binPrice = lowestPrice + step * (j + 0.5)
        array.set(binPrices, j, binPrice)
        for k = 0 to array.size(prices) - 1
            float p = array.get(prices, k)
            if p >= lowestPrice + step * j and p < lowestPrice + step * (j + 1)
                array.set(binVols, j, array.get(binVols, j) + array.get(volumes, k))

    // Find POC (highest volume bin)
    float maxVol = 0.0
    int pocBin = 0
    for m = 0 to numRows - 1
        if array.get(binVols, m) > maxVol
            maxVol := array.get(binVols, m)
            pocBin := m
    pocPrice := array.get(binPrices, pocBin)

    // Calculate Value Area (70% by default)
    float totalVPVol = array.sum(binVols)
    float targetVol = totalVPVol * valueAreaPct / 100.0
    float cumVol = array.get(binVols, pocBin)
    int upperBin = pocBin
    int lowerBin = pocBin

    while cumVol < targetVol and (upperBin < numRows - 1 or lowerBin > 0)
        float upVol = upperBin < numRows - 1 ? array.get(binVols, upperBin + 1) : 0.0
        float downVol = lowerBin > 0 ? array.get(binVols, lowerBin - 1) : 0.0
        if upVol >= downVol and upperBin < numRows - 1
            upperBin += 1
            cumVol += upVol
        else if lowerBin > 0
            lowerBin -= 1
            cumVol += downVol
        else
            break

    vahPrice := array.get(binPrices, upperBin)
    valPrice := array.get(binPrices, lowerBin)

    [pocPrice, vahPrice, valPrice]

[poc, vah, val] = calcVolumeProfile()

// === Signal Detection ===
// POC Bounce Signal
pocBounceBuy = ta.crossover(close, poc) and close > open
pocBounceSell = ta.crossunder(close, poc) and close < open

// VAH Breakout
vahBreakout = ta.crossover(close, vah) and volume > ta.sma(volume, 20) * 1.5

// VAL Breakdown
valBreakdown = ta.crossunder(close, val) and volume > ta.sma(volume, 20) * 1.5

// HVN Rejection (simplified: large range rejection at current value levels)
hvnRejectBuy = low <= poc and close > open and range > ta.sma(range, 20) * 1.3
hvnRejectSell = high >= poc and close < open and range > ta.sma(range, 20) * 1.3

// LVN Gap Fill Signal
lvnGap = math.abs(vah - val) < math.abs(vah - val) * 0.3
lvnSignal = lvnGap and close > vah and volume > ta.sma(volume, 20) * 2.0

// === Plotting ===
plot(showPOC ? poc : na, "POC", color=#FFC107, linewidth=2)
plot(showVA ? vah : na, "VAH", color=#42A5F5, linewidth=1, style=plot.style_circles)
plot(showVA ? val : na, "VAL", color=#42A5F5, linewidth=1, style=plot.style_circles)
fill(plot(showVA ? vah : na), plot(showVA ? val : na), color=color.new(#42A5F5, 92), title="Value Area")

// POC Bounce Labels
plotshape(pocBounceBuy, "POC Bounce Buy", shape.labelup, location.belowbar, color=color.new(#4CAF50, 30), text="POC B", textcolor=#4CAF50, size=size.tiny)
plotshape(pocBounceSell, "POC Bounce Sell", shape.labeldown, location.abovebar, color=color.new(#FF5252, 30), text="POC S", textcolor=#FF5252, size=size.tiny)

// VAH/VAL Breakout Labels
plotshape(vahBreakout, "VAH Breakout", shape.labelup, location.belowbar, color=color.new(#4CAF50, 30), text="VAH B/O", textcolor=#4CAF50, size=size.tiny)
plotshape(valBreakdown, "VAL Breakdown", shape.labeldown, location.abovebar, color=color.new(#FF5252, 30), text="VAL B/D", textcolor=#FF5252, size=size.tiny)

// HVN Rejection Labels
plotshape(hvnRejectBuy, "HVN Reject Buy", shape.arrowup, location.belowbar, color=#4CAF50, size=size.small)
plotshape(hvnRejectSell, "HVN Reject Sell", shape.arrowdown, location.abovebar, color=#FF5252, size=size.small)

// LVN Signal
plotshape(lvnSignal, "LVN Gap", shape.star, location.top, color=#E040FB, size=size.small)

// === Alerts ===
alertcondition(pocBounceBuy, "POC Bounce Buy", "Price bounced at POC - bullish signal")
alertcondition(pocBounceSell, "POC Bounce Sell", "Price rejected at POC - bearish signal")
alertcondition(vahBreakout, "VAH Breakout", "Price broke above VAH with volume")
alertcondition(valBreakdown, "VAL Breakdown", "Price broke below VAL with volume")