Advanced Candlestick Pattern Strategy

//@version=5
strategy("Advanced Candlestick Pattern Strategy", overlay=true)

// ============================================
// INPUT PARAMETERS
// ============================================

// Pattern Detection Settings
patternStrength = input.int(3, "Pattern Strength", minval=1, maxval=5, group="Pattern Detection")
bodyRatio = input.float(0.65, "Body/Range Ratio", minval=0.1, maxval=0.9, step=0.05, group="Pattern Detection")
shadowRatio = input.float(2.2, "Shadow/Body Ratio", minval=1.0, maxval=5.0, step=0.1, group="Pattern Detection")
patternLookback = input.int(3, "Pattern Lookback", minval=1, maxval=10, group="Pattern Detection")
minPatternSize = input.float(0.5, "Min Pattern Size (ATR)", minval=0.3, maxval=2.0, step=0.1, group="Pattern Detection")

// Enable/Disable Patterns
enableHammer = input.bool(true, "Hammer & Hanging Man", group="Reversal Patterns")
enableDoji = input.bool(true, "Doji Family", group="Reversal Patterns")
enableEngulfing = input.bool(true, "Engulfing Patterns", group="Reversal Patterns")
enableStar = input.bool(true, "Morning/Evening Star", group="Reversal Patterns")
enableHarami = input.bool(true, "Harami Patterns", group="Reversal Patterns")
enablePiercing = input.bool(true, "Piercing Line/Dark Cloud", group="Reversal Patterns")
enableShootingStar = input.bool(true, "Shooting Star", group="Reversal Patterns")
enableInvertedHammer = input.bool(true, "Inverted Hammer", group="Reversal Patterns")

// Confirmation Settings
useVolumeConfirmation = input.bool(true, "Volume Confirmation", group="Confirmations")
volumeMultiplier = input.float(1.15, "Volume Multiple", minval=1.0, maxval=3.0, step=0.1, group="Confirmations")
useTrendConfirmation = input.bool(true, "Trend Confirmation", group="Confirmations")
trendPeriod = input.int(20, "Trend EMA Period", minval=5, maxval=50, group="Confirmations")
useRSIConfirmation = input.bool(true, "RSI Confirmation", group="Confirmations")
rsiPeriod = input.int(14, "RSI Period", minval=5, maxval=30, group="Confirmations")
rsiOverbought = input.int(70, "RSI Overbought", minval=60, maxval=90, group="Confirmations")
rsiOversold = input.int(30, "RSI Oversold", minval=10, maxval=40, group="Confirmations")
useMAConfirmation = input.bool(false, "Moving Average Filter", group="Confirmations")
maFastPeriod = input.int(9, "Fast MA Period", minval=5, maxval=20, group="Confirmations")
maSlowPeriod = input.int(21, "Slow MA Period", minval=10, maxval=50, group="Confirmations")
useVolatilityFilter = input.bool(false, "Volatility Filter", group="Confirmations")
volatilityPeriod = input.int(20, "Volatility Period", minval=10, maxval=50, group="Confirmations")
minVolatility = input.float(0.8, "Min Volatility Threshold", minval=0.5, maxval=3.0, step=0.1, group="Confirmations")

// Risk Management
stopLossType = input.string("ATR", "Stop Loss Type", options=["Percentage", "ATR", "Pattern Based"], group="Risk Management")
stopLossPercent = input.float(1.5, "Stop Loss %", minval=0.5, maxval=10, step=0.1, group="Risk Management")
atrPeriod = input.int(14, "ATR Period", minval=5, maxval=30, group="Risk Management")
atrMultiplier = input.float(1.6, "ATR Multiplier", minval=1.0, maxval=5.0, step=0.1, group="Risk Management")
takeProfitRatio = input.float(3.2, "Risk/Reward Ratio", minval=1.0, maxval=10.0, step=0.5, group="Risk Management")
useTrailingStop = input.bool(true, "Trailing Stop", group="Risk Management")
trailingStopPercent = input.float(1.0, "Trailing Stop %", minval=0.5, maxval=5.0, step=0.1, group="Risk Management")
useBreakeven = input.bool(true, "Move to Breakeven", group="Risk Management")
breakevenRatio = input.float(1.0, "Breakeven at R:R", minval=0.5, maxval=2.0, step=0.1, group="Risk Management")
useDynamicSizing = input.bool(true, "Dynamic Position Sizing", group="Risk Management")
maxRiskPerTrade = input.float(1.0, "Max Risk Per Trade %", minval=0.1, maxval=5.0, step=0.1, group="Risk Management")

// ============================================
// TECHNICAL INDICATORS
// ============================================

// ATR for volatility-based stops
atrValue = ta.atr(atrPeriod)

// Trend confirmation
ema = ta.ema(close, trendPeriod)
uptrend = close > ema
downtrend = close < ema

// Moving Average Filter
maFast = ta.ema(close, maFastPeriod)
maSlow = ta.ema(close, maSlowPeriod)
bullishTrendMA = maFast > maSlow and close > maFast
bearishTrendMA = maFast < maSlow and close < maFast

// RSI for momentum confirmation
rsi = ta.rsi(close, rsiPeriod)
rsiOverboughtCondition = rsi > rsiOverbought
rsiOversoldCondition = rsi < rsiOversold
rsiNeutral = rsi > 40 and rsi < 60

// Volume confirmation
avgVolume = ta.sma(volume, 20)
highVolume = volume > avgVolume * volumeMultiplier

// Volatility Filter
volatility = ta.stdev(ta.change(close), volatilityPeriod) / close * 100
highVolatility = volatility > minVolatility

// ============================================
// CANDLESTICK PATTERN FUNCTIONS
// ============================================

// Basic candle properties
bodySize = math.abs(close - open)
totalRange = high - low
upperShadow = high - math.max(close, open)
lowerShadow = math.min(close, open) - low
bodyRatioActual = totalRange > 0 ? bodySize / totalRange : 0
upperShadowRatio = bodySize > 0 ? upperShadow / bodySize : 0
lowerShadowRatio = bodySize > 0 ? lowerShadow / bodySize : 0

// Color determination
bullishCandle = close > open
bearishCandle = close < open

// ============================================
// PATTERN DETECTION FUNCTIONS
// ============================================

// Doji Pattern
isDoji() =>
    bodyRatioActual < 0.1 and totalRange > atrValue * 0.5

// Hammer Pattern (bullish reversal at bottom)
isHammer() => lowerShadow >= bodySize * shadowRatio and upperShadow <= bodySize * 0.5 and bodyRatioActual >= bodyRatio * 0.5 and bodyRatioActual <= 0.8

// Shooting Star Pattern (bearish reversal at top)
isShootingStar() => upperShadow >= bodySize * shadowRatio and lowerShadow <= bodySize * 0.5 and bodyRatioActual >= bodyRatio * 0.5 and bodyRatioActual <= 0.8

// Inverted Hammer (bullish reversal at bottom)
isInvertedHammer() => upperShadow >= bodySize * shadowRatio and lowerShadow <= bodySize * 0.5 and bodyRatioActual >= bodyRatio * 0.5

// Bullish Engulfing
isBullishEngulfing() => bearishCandle[1] and bullishCandle and open <= close[1] and close > open[1] and bodySize > bodySize[1] * 1.2

// Bearish Engulfing
isBearishEngulfing() => bullishCandle[1] and bearishCandle and open >= close[1] and close < open[1] and bodySize > bodySize[1] * 1.2

// Morning Star (3-candle bullish reversal)
isMorningStar() => bearishCandle[2] and bodySize[2] > atrValue and bodyRatioActual[1] < 0.3 and bullishCandle and close > (open[2] + close[2]) / 2

// Evening Star (3-candle bearish reversal)
isEveningStar() => bullishCandle[2] and bodySize[2] > atrValue and bodyRatioActual[1] < 0.3 and bearishCandle and close < (open[2] + close[2]) / 2

// Bullish Harami
isBullishHarami() => bearishCandle[1] and bullishCandle and open > close[1] and close < open[1] and bodySize < bodySize[1] * 0.7

// Bearish Harami
isBearishHarami() => bullishCandle[1] and bearishCandle and open < close[1] and close > open[1] and bodySize < bodySize[1] * 0.7

// Piercing Line (bullish reversal)
isPiercingLine() => bearishCandle[1] and bullishCandle and open < low[1] and close > (open[1] + close[1]) / 2 and close < open[1]

// Dark Cloud Cover (bearish reversal)
isDarkCloud() => bullishCandle[1] and bearishCandle and open > high[1] and close < (open[1] + close[1]) / 2 and close > open[1]

// ============================================
// PATTERN DETECTION LOGIC
// ============================================

// Bullish patterns
bullishDoji = enableDoji and isDoji() and downtrend
bullishHammer = enableHammer and isHammer() and downtrend
bullishInvertedHammer = enableInvertedHammer and isInvertedHammer() and downtrend
bullishEngulfing = enableEngulfing and isBullishEngulfing()
bullishMorningStar = enableStar and isMorningStar()
bullishHarami = enableHarami and isBullishHarami()
bullishPiercing = enablePiercing and isPiercingLine()

// Bearish patterns
bearishDoji = enableDoji and isDoji() and uptrend
bearishShootingStar = enableShootingStar and isShootingStar() and uptrend
bearishHangingMan = enableHammer and isHammer() and uptrend
bearishEngulfing = enableEngulfing and isBearishEngulfing()
bearishEveningStar = enableStar and isEveningStar()
bearishHarami = enableHarami and isBearishHarami()
bearishDarkCloud = enablePiercing and isDarkCloud()

// Combined pattern signals
bullishPatternDetected = bullishDoji or bullishHammer or bullishInvertedHammer or bullishEngulfing or bullishMorningStar or bullishHarami or bullishPiercing
bearishPatternDetected = bearishDoji or bearishShootingStar or bearishHangingMan or bearishEngulfing or bearishEveningStar or bearishHarami or bearishDarkCloud

// ============================================
// CONFIRMATION CONDITIONS
// ============================================

// Volume confirmation
volumeConfirmed = useVolumeConfirmation ? highVolume : true

// Trend confirmation - more relaxed
trendConfirmedBullish = useTrendConfirmation ? (close > ema * 0.99 or not uptrend) : true
trendConfirmedBearish = useTrendConfirmation ? (close < ema * 1.01 or not downtrend) : true

// MA confirmation
maConfirmedBullish = useMAConfirmation ? bullishTrendMA : true
maConfirmedBearish = useMAConfirmation ? bearishTrendMA : true

// RSI confirmation - more relaxed
rsiConfirmedBullish = useRSIConfirmation ? (rsi < 55 and not rsiOverboughtCondition) : true
rsiConfirmedBearish = useRSIConfirmation ? (rsi > 45 and not rsiOversoldCondition) : true

// Volatility confirmation
volatilityConfirmed = useVolatilityFilter ? highVolatility : true

// ============================================
// ENTRY CONDITIONS
// ============================================

// Long entry condition - balanced
longCondition = bullishPatternDetected and volumeConfirmed and trendConfirmedBullish and rsiConfirmedBullish

// Short entry condition - balanced
shortCondition = bearishPatternDetected and volumeConfirmed and trendConfirmedBearish and rsiConfirmedBearish

// ============================================
// STOP LOSS CALCULATION
// ============================================

calculateStopLoss(isLong) =>
    if stopLossType == "Percentage"
        if isLong
            close * (1 - stopLossPercent / 100)
        else
            close * (1 + stopLossPercent / 100)
    else if stopLossType == "ATR"
        if isLong
            close - atrValue * atrMultiplier
        else
            close + atrValue * atrMultiplier
    else // Pattern Based
        if isLong
            math.min(low, low[1]) - atrValue * 0.5
        else
            math.max(high, high[1]) + atrValue * 0.5

// ============================================
// POSITION MANAGEMENT
// ============================================

var float longStopLoss = na
var float shortStopLoss = na
var float longTakeProfit = na
var float shortTakeProfit = na

calculatePositionSize(stopDistance) =>
    if useDynamicSizing
        riskAmount = strategy.equity * maxRiskPerTrade / 100
        math.min(riskAmount / stopDistance, strategy.equity * 0.1)
    else
        strategy.equity * 0.08

// Execute long trades with dynamic sizing
if longCondition and strategy.position_size == 0
    stopLoss = calculateStopLoss(true)
    stopDistance = close - stopLoss
    takeProfit = close + stopDistance * takeProfitRatio
    posSize = calculatePositionSize(stopDistance)
    
    strategy.entry("Long", strategy.long, qty=posSize)
    longStopLoss := stopLoss
    longTakeProfit := takeProfit

// Execute short trades with dynamic sizing
if shortCondition and strategy.position_size == 0
    stopLoss = calculateStopLoss(false)
    stopDistance = stopLoss - close
    takeProfit = close - stopDistance * takeProfitRatio
    posSize = calculatePositionSize(stopDistance)
    
    strategy.entry("Short", strategy.short, qty=posSize)
    shortStopLoss := stopLoss
    shortTakeProfit := takeProfit

// Breakeven logic
if useBreakeven and strategy.position_size > 0
    breakevenPrice = strategy.position_avg_price + (longTakeProfit - strategy.position_avg_price) * breakevenRatio / takeProfitRatio
    if close >= breakevenPrice and longStopLoss < strategy.position_avg_price
        longStopLoss := strategy.position_avg_price + atrValue * 0.1

if useBreakeven and strategy.position_size < 0
    breakevenPrice = strategy.position_avg_price - (strategy.position_avg_price - shortTakeProfit) * breakevenRatio / takeProfitRatio
    if close <= breakevenPrice and shortStopLoss > strategy.position_avg_price
        shortStopLoss := strategy.position_avg_price - atrValue * 0.1

// Partial profit taking
if strategy.position_size > 0
    // Take 30% profit at 1.5R
    if close >= strategy.position_avg_price + (longTakeProfit - strategy.position_avg_price) * 0.6
        strategy.close("Long", qty_percent=30, comment="Partial TP 1")
    
    // Take another 30% at 2R
    if close >= strategy.position_avg_price + (longTakeProfit - strategy.position_avg_price) * 0.8
        strategy.close("Long", qty_percent=30, comment="Partial TP 2")
    
    strategy.exit("Long Exit", "Long", stop=longStopLoss, limit=longTakeProfit)
    
    // Enhanced trailing stop
    if useTrailingStop and close > strategy.position_avg_price * (1 + trailingStopPercent / 100)
        trailDistance = atrValue * 1.5
        newStop = close - trailDistance
        if newStop > longStopLoss
            longStopLoss := newStop

if strategy.position_size < 0
    // Take 30% profit at 1.5R
    if close <= strategy.position_avg_price - (strategy.position_avg_price - shortTakeProfit) * 0.6
        strategy.close("Short", qty_percent=30, comment="Partial TP 1")
    
    // Take another 30% at 2R
    if close <= strategy.position_avg_price - (strategy.position_avg_price - shortTakeProfit) * 0.8
        strategy.close("Short", qty_percent=30, comment="Partial TP 2")
    
    strategy.exit("Short Exit", "Short", stop=shortStopLoss, limit=shortTakeProfit)
    
    // Enhanced trailing stop
    if useTrailingStop and close < strategy.position_avg_price * (1 - trailingStopPercent / 100)
        trailDistance = atrValue * 1.5
        newStop = close + trailDistance
        if newStop < shortStopLoss
            shortStopLoss := newStop

// ============================================
// VISUALIZATION
// ============================================

// Plot trend EMA
plot(ema, "Trend EMA", color=color.orange, linewidth=1)
plot(maFast, "Fast MA", color=color.blue, linewidth=1)
plot(maSlow, "Slow MA", color=color.red, linewidth=1)

// Plot pattern signals
// Plot pattern signals
plotshape(bullishPatternDetected and volumeConfirmed, title="Bullish Pattern", location=location.belowbar, color=color.green, style=shape.triangleup, size=size.small)
plotshape(bearishPatternDetected and volumeConfirmed, title="Bearish Pattern", location=location.abovebar, color=color.red, style=shape.triangledown, size=size.small)

// Plot entry signals
plotshape(longCondition, title="Long Entry", location=location.belowbar, color=color.lime, style=shape.arrowup, size=size.normal)
plotshape(shortCondition, title="Short Entry", location=location.abovebar, color=color.fuchsia, style=shape.arrowdown, size=size.normal)

// Plot stop levels
plot(strategy.position_size > 0 ? longStopLoss : na, "Long Stop", color=color.red, style=plot.style_linebr)
plot(strategy.position_size < 0 ? shortStopLoss : na, "Short Stop", color=color.red, style=plot.style_linebr)
plot(strategy.position_size > 0 ? longTakeProfit : na, "Long Target", color=color.green, style=plot.style_linebr)
plot(strategy.position_size < 0 ? shortTakeProfit : na, "Short Target", color=color.green, style=plot.style_linebr)

// Background color for trend
bgcolor(uptrend ? color.new(color.green, 95) : color.new(color.red, 95), title="Trend Background")

// ============================================
// ALERTS
// ============================================

alertcondition(longCondition, title="Bullish Pattern Alert", message="Bullish candlestick pattern detected - Consider LONG")
alertcondition(shortCondition, title="Bearish Pattern Alert", message="Bearish candlestick pattern detected - Consider SHORT")