Candlestick Patterns

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

//@version=6
indicator("Candlestick Patterns", overlay=true, max_labels_count=100)

// INPUTS
showBullish = input.bool(true, "Show Bullish Patterns", group="Display")
showBearish = input.bool(true, "Show Bearish Patterns", group="Display")
showLabels = input.bool(true, "Show Pattern Names", group="Display")
sensitivity = input.string("Normal", "Sensitivity", options=["Strict", "Normal", "Relaxed"], group="Settings")

// SENSITIVITY MULTIPLIERS
strictMult = sensitivity == "Strict" ? 0.8 : sensitivity == "Normal" ? 1.0 : 1.2

// CANDLE MEASUREMENTS
bodySize = math.abs(close - open)
upperWick = high - math.max(close, open)
lowerWick = math.min(close, open) - low
fullRange = high - low
avgBody = ta.sma(bodySize, 14)
avgRange = ta.atr(14)

isBullish = close > open
isBearish = close < open
smallBody = bodySize < avgBody * 0.3 * strictMult
largeBody = bodySize > avgBody * 1.5 * strictMult
longUpperWick = upperWick > bodySize * 2
longLowerWick = lowerWick > bodySize * 2

// PREVIOUS CANDLE DATA
prevOpen = open[1]
prevClose = close[1]
prevHigh = high[1]
prevLow = low[1]
prevBodySize = math.abs(prevClose - prevOpen)
prevBullish = prevClose > prevOpen
prevBearish = prevClose < prevOpen

// =============================================================================
// BULLISH CANDLESTICK PATTERNS
// =============================================================================

// HAMMER (bullish reversal)
// Small body at top, long lower wick, appears after downtrend
isHammer = isBullish and longLowerWick and upperWick < bodySize and close > (high - fullRange * 0.3) and close[1] < open[1]

// INVERTED HAMMER (bullish reversal)
// Small body at bottom, long upper wick, appears after downtrend
isInvertedHammer = smallBody and longUpperWick and lowerWick < bodySize and close[1] < open[1]

// BULLISH ENGULFING (bullish reversal)
// Large bullish candle fully engulfs previous bearish candle
isBullishEngulfing = isBullish and prevBearish and open <= prevClose and close >= prevOpen and bodySize > prevBodySize

// MORNING STAR (bullish reversal - 3 candles)
// Large bear, small body, large bull
isMorningStar = close[2] < open[2] and smallBody[1] and isBullish and close > (open[2] + close[2]) / 2 and math.abs(close[2] - open[2]) > avgBody

// PIERCING PATTERN (bullish reversal)
// Bullish candle closes above midpoint of previous bearish candle
isPiercing = isBullish and prevBearish and open < prevLow and close > (prevOpen + prevClose) / 2 and close < prevOpen

// THREE WHITE SOLDIERS (strong bullish continuation)
// Three consecutive bullish candles with higher closes
isThreeWhiteSoldiers = isBullish and close[1] > open[1] and close[2] > open[2] and close > close[1] and close[1] > close[2] and open > open[1] and open[1] > open[2]

// BULLISH HARAMI (bullish reversal)
// Small bullish candle inside previous large bearish candle
isBullishHarami = isBullish and prevBearish and open > prevClose and close < prevOpen and bodySize < prevBodySize * 0.5

// DRAGONFLY DOJI (bullish reversal)
// Very small body, long lower wick, no upper wick
isDragonflyDoji = smallBody and lowerWick > bodySize * 3 and upperWick < bodySize and close[1] < open[1]

// =============================================================================
// BEARISH CANDLESTICK PATTERNS
// =============================================================================

// HANGING MAN (bearish reversal)
// Small body at top, long lower wick, appears after uptrend
isHangingMan = isBearish and longLowerWick and upperWick < bodySize and close < (high - fullRange * 0.7) and close[1] > open[1]

// SHOOTING STAR (bearish reversal)
// Small body at bottom, long upper wick, appears after uptrend
isShootingStar = smallBody and longUpperWick and lowerWick < bodySize and close[1] > open[1]

// BEARISH ENGULFING (bearish reversal)
// Large bearish candle fully engulfs previous bullish candle
isBearishEngulfing = isBearish and prevBullish and open >= prevClose and close <= prevOpen and bodySize > prevBodySize

// EVENING STAR (bearish reversal - 3 candles)
// Large bull, small body, large bear
isEveningStar = close[2] > open[2] and smallBody[1] and isBearish and close < (open[2] + close[2]) / 2 and math.abs(close[2] - open[2]) > avgBody

// DARK CLOUD COVER (bearish reversal)
// Bearish candle closes below midpoint of previous bullish candle
isDarkCloud = isBearish and prevBullish and open > prevHigh and close < (prevOpen + prevClose) / 2 and close > prevOpen

// THREE BLACK CROWS (strong bearish continuation)
// Three consecutive bearish candles with lower closes
isThreeBlackCrows = isBearish and close[1] < open[1] and close[2] < open[2] and close < close[1] and close[1] < close[2] and open < open[1] and open[1] < open[2]

// BEARISH HARAMI (bearish reversal)
// Small bearish candle inside previous large bullish candle
isBearishHarami = isBearish and prevBullish and open < prevClose and close > prevOpen and bodySize < prevBodySize * 0.5

// GRAVESTONE DOJI (bearish reversal)
// Very small body, long upper wick, no lower wick
isGravestoneDoji = smallBody and upperWick > bodySize * 3 and lowerWick < bodySize and close[1] > open[1]

// =============================================================================
// BREAK AND RETEST DETECTION
// =============================================================================

// Track recent support/resistance breaks
var float brokenResistance = na
var float brokenSupport = na
var int breakBar = 0

// Detect resistance break
resistanceLevel = ta.highest(high, 20)
if close > resistanceLevel[1] and close[1] <= resistanceLevel[1]
    brokenResistance := resistanceLevel[1]
    breakBar := bar_index

// Detect support break
supportLevel = ta.lowest(low, 20)
if close < supportLevel[1] and close[1] >= supportLevel[1]
    brokenSupport := supportLevel[1]
    breakBar := bar_index

// BULLISH RETEST (price broke resistance, pulled back, now retesting)
isBullishRetest = false
if not na(brokenResistance) and (bar_index - breakBar) < 20
    // Price pulled back to broken resistance
    if low <= brokenResistance * 1.01 and low >= brokenResistance * 0.99
        // Bullish candle bouncing off the level
        if isBullish and close > open
            isBullishRetest := true

// BEARISH RETEST (price broke support, bounced back, now retesting)
isBearishRetest = false
if not na(brokenSupport) and (bar_index - breakBar) < 20
    // Price bounced back to broken support
    if high >= brokenSupport * 0.99 and high <= brokenSupport * 1.01
        // Bearish candle rejecting the level
        if isBearish and close < open
            isBearishRetest := true

// Clear old breaks
if bar_index - breakBar > 20
    brokenResistance := na
    brokenSupport := na

// =============================================================================
// NEUTRAL PATTERNS
// =============================================================================

// DOJI (indecision)
// Very small body, equal wicks
isDoji = smallBody and math.abs(upperWick - lowerWick) < fullRange * 0.3

// SPINNING TOP (indecision)
// Small body in middle, similar wicks on both sides
isSpinningTop = smallBody and upperWick > bodySize and lowerWick > bodySize and not isDoji

// =============================================================================
// PLOT SIGNALS
// =============================================================================

// BREAK & RETEST - Most important signals!
plotshape(isBullishRetest, "Bull Retest", shape.circle, location.belowbar, color.new(color.aqua, 0), text="RETEST ↑", size=size.normal)
plotshape(isBearishRetest, "Bear Retest", shape.circle, location.abovebar, color.new(color.orange, 0), text="RETEST ↓", size=size.normal)

// BULLISH PATTERNS
// BULLISH PATTERNS
plotshape(showBullish and isHammer, "Hammer", shape.labelup, location.belowbar, color.new(color.lime, 0), text="HAMMER", size=size.small)
plotshape(showBullish and isInvertedHammer, "Inv Hammer", shape.labelup, location.belowbar, color.new(color.lime, 20), size=size.tiny, text="INV HAMMER")
plotshape(showBullish and isBullishEngulfing, "Bull Engulf", shape.labelup, location.belowbar, color.new(color.green, 0), size=size.normal, text="ENGULF ↑")
plotshape(showBullish and isMorningStar, "Morning Star", shape.labelup, location.belowbar, color.new(color.lime, 0), size=size.normal, text="MORNING★")
plotshape(showBullish and isPiercing, "Piercing", shape.labelup, location.belowbar, color.new(color.green, 20), size=size.tiny, text="PIERCE")
plotshape(showBullish and isThreeWhiteSoldiers, "3 White", shape.labelup, location.belowbar, color.new(color.lime, 0), size=size.normal, text="3 BULLS")
plotshape(showBullish and isBullishHarami, "Bull Harami", shape.labelup, location.belowbar, color.new(color.green, 30), size=size.tiny, text="HARAMI↑")
plotshape(showBullish and isDragonflyDoji, "Dragonfly", shape.labelup, location.belowbar, color.new(color.lime, 20), size=size.tiny, text="DFLY")

// BEARISH PATTERNS
plotshape(showBearish and isHangingMan, "Hanging Man", shape.labeldown, location.abovebar, color.new(color.orange, 0), text="HANG MAN", size=size.small)
plotshape(showBearish and isShootingStar, "Shooting Star", shape.labeldown, location.abovebar, color.new(color.orange, 20), size=size.tiny, text="SHOOT★")
plotshape(showBearish and isBearishEngulfing, "Bear Engulf", shape.labeldown, location.abovebar, color.new(color.red, 0), size=size.normal, text="ENGULF ↓")
plotshape(showBearish and isEveningStar, "Evening Star", shape.labeldown, location.abovebar, color.new(color.orange, 0), size=size.normal, text="EVENING★")
plotshape(showBearish and isDarkCloud, "Dark Cloud", shape.labeldown, location.abovebar, color.new(color.red, 20), size=size.tiny, text="DARK☁")
plotshape(showBearish and isThreeBlackCrows, "3 Black", shape.labeldown, location.abovebar, color.new(color.red, 0), size=size.normal, text="3 BEARS")
plotshape(showBearish and isBearishHarami, "Bear Harami", shape.labeldown, location.abovebar, color.new(color.red, 30), size=size.tiny, text="HARAMI↓")
plotshape(showBearish and isGravestoneDoji, "Gravestone", shape.labeldown, location.abovebar, color.new(color.orange, 20), size=size.tiny, text="GRAVE")

// NEUTRAL PATTERNS
plotshape(isDoji and not (isDragonflyDoji or isGravestoneDoji), "Doji", shape.diamond, location.abovebar, color.new(color.gray, 50), size=size.tiny, text="DOJI")

// BACKGROUND COLORING
bgcolor(isBullishRetest ? color.new(color.aqua, 90) : na, title="Bullish Retest")
bgcolor(isBearishRetest ? color.new(color.orange, 90) : na, title="Bearish Retest")
bgcolor(isHammer or isBullishEngulfing or isMorningStar ? color.new(color.lime, 95) : na)
bgcolor(isShootingStar or isBearishEngulfing or isEveningStar ? color.new(color.red, 95) : na)

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

// BREAK & RETEST - Critical trading signals
alertcondition(isBullishRetest, "Bullish Retest", "Bullish Break & Retest - HIGH PROBABILITY BUY")
alertcondition(isBearishRetest, "Bearish Retest", "Bearish Break & Retest - HIGH PROBABILITY SELL")

// Strong reversal patterns
alertcondition(isHammer, "Hammer", "Hammer pattern - Bullish reversal")
alertcondition(isBullishEngulfing, "Bullish Engulfing", "Bullish Engulfing - Strong reversal")
alertcondition(isMorningStar, "Morning Star", "Morning Star - Major bullish reversal")
alertcondition(isShootingStar, "Shooting Star", "Shooting Star - Bearish reversal")
alertcondition(isBearishEngulfing, "Bearish Engulfing", "Bearish Engulfing - Strong reversal")
alertcondition(isEveningStar, "Evening Star", "Evening Star - Major bearish reversal")
alertcondition(isThreeWhiteSoldiers, "Three White Soldiers", "Three White Soldiers - Strong bullish")
alertcondition(isThreeBlackCrows, "Three Black Crows", "Three Black Crows - Strong bearish")