Hammer & Inverted Hammer 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 - Modified for Hammer Patterns Only

//@version=6
indicator("Hammer & Inverted Hammer Patterns", overlay=true, max_labels_count=100)

// INPUTS
showBullishHammer = input.bool(true, "Show Bullish Hammer", group="Hammer Patterns")
showInvertedHammer = input.bool(true, "Show Inverted Hammer", group="Hammer Patterns")
showBearishHammer = input.bool(true, "Show Bearish Hammer (Hanging Man)", group="Hammer Patterns")
showShootingStar = input.bool(true, "Show Shooting Star (Inverted Bearish)", group="Hammer Patterns")
sensitivity = input.string("Normal", "Sensitivity", options=["Strict", "Normal", "Relaxed"], group="Settings")
wickMultiplier = input.float(2.0, "Wick to Body Ratio", minval=1.5, maxval=4.0, step=0.5, group="Settings")
useTimeframeFilter = input.bool(true, "Only Show on 2-Minute Chart", group="Settings")

// TIMEFRAME CHECK
is2MinChart = timeframe.period == "2"
showPatterns = not useTimeframeFilter or is2MinChart

// 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 * 0.5 * strictMult

// Dynamic wick checks
longUpperWick = upperWick > bodySize * wickMultiplier
longLowerWick = lowerWick > bodySize * wickMultiplier

// =============================================================================
// HAMMER PATTERN DETECTION
// =============================================================================

// BULLISH HAMMER (bullish reversal)
// Small body at top, long lower wick, appears after downtrend
// Body should be in upper part of the candle
isBullishHammer = longLowerWick and 
                  upperWick < bodySize * strictMult and 
                  close > (high - fullRange * 0.3) and 
                  close[1] < open[1] and
                  lowerWick > fullRange * 0.6

// INVERTED HAMMER (bullish reversal)
// Small body at bottom, long upper wick, appears after downtrend
// Body should be in lower part of the candle
isInvertedHammer = longUpperWick and 
                   lowerWick < bodySize * strictMult and 
                   close < (low + fullRange * 0.3) and
                   close[1] < open[1] and
                   upperWick > fullRange * 0.6

// HANGING MAN / BEARISH HAMMER (bearish reversal)
// Same as hammer but appears after uptrend
// Small body at top, long lower wick
isHangingMan = longLowerWick and 
               upperWick < bodySize * strictMult and 
               close < (high - fullRange * 0.7) and 
               close[1] > open[1] and
               lowerWick > fullRange * 0.6

// SHOOTING STAR / INVERTED BEARISH HAMMER (bearish reversal)
// Same as inverted hammer but appears after uptrend
// Small body at bottom, long upper wick
isShootingStar = longUpperWick and 
                 lowerWick < bodySize * strictMult and 
                 close[1] > open[1] and
                 upperWick > fullRange * 0.6

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

// BULLISH PATTERNS (Green/Lime colors)
plotshape(showPatterns and showBullishHammer and isBullishHammer, 
          title="Bullish Hammer", 
          style=shape.labelup, 
          location=location.belowbar, 
          color=color.new(color.lime, 0), 
          text="HAMMER ↑", 
          size=size.normal)

plotshape(showPatterns and showInvertedHammer and isInvertedHammer, 
          title="Inverted Hammer", 
          style=shape.labelup, 
          location=location.belowbar, 
          color=color.new(color.green, 0), 
          text="INV HAMMER ↑", 
          size=size.normal)

// BEARISH PATTERNS (Red/Orange colors)
plotshape(showPatterns and showBearishHammer and isHangingMan, 
          title="Hanging Man", 
          style=shape.labeldown, 
          location=location.abovebar, 
          color=color.new(color.orange, 0), 
          text="HAMMER ↓", 
          size=size.normal)

plotshape(showPatterns and showShootingStar and isShootingStar, 
          title="Shooting Star", 
          style=shape.labeldown, 
          location=location.abovebar, 
          color=color.new(color.red, 0), 
          text="INV HAMMER ↓", 
          size=size.normal)

// BACKGROUND COLORING (subtle)
bgcolor(showPatterns and (isBullishHammer or isInvertedHammer) ? color.new(color.lime, 95) : na, title="Bullish Hammer Background")
bgcolor(showPatterns and (isHangingMan or isShootingStar) ? color.new(color.red, 95) : na, title="Bearish Hammer Background")

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

alertcondition(isBullishHammer, "Bullish Hammer", "Bullish Hammer detected - Potential reversal UP")
alertcondition(isInvertedHammer, "Inverted Hammer", "Inverted Hammer detected - Potential reversal UP")
alertcondition(isHangingMan, "Hanging Man", "Hanging Man detected - Potential reversal DOWN")
alertcondition(isShootingStar, "Shooting Star", "Shooting Star detected - Potential reversal DOWN")

// Combined alerts
alertcondition(isBullishHammer or isInvertedHammer, "Any Bullish Hammer", "Bullish Hammer Pattern - Consider LONG")
alertcondition(isHangingMan or isShootingStar, "Any Bearish Hammer", "Bearish Hammer Pattern - Consider SHORT")