MACD + Supertrend + DEMA Strategy

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STRATEGY 📊 STRATEGY LOGIC:
Long Entry: When ALL of these occur simultaneously:

MACD histogram crosses above 0

Supertrend is bullish (green)

Short DEMA > Long DEMA

Short Entry: When ALL of these occur simultaneously:

MACD histogram crosses below 0

Supertrend is bearish (red)

Short DEMA < Long DEMA

Exits: Based on your TP/SL percentages from entry price

This follows the same clean structure as your MACD strategy but adds the alignment concept and proper risk management!

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Pine Script Source

//@version=6
strategy("MACD + Supertrend + DEMA Strategy", overlay=true, margin_long=100, margin_short=100)

// ===== INPUT PARAMETERS =====
// MACD Settings
fastLength = input(12, "Fast Length")
slowlength = input(26, "Slow Length") 
MACDLength = input(9, "MACD Length")

// Supertrend Settings
atrPeriod = input(10, "ATR Period")
multiplier = input(3.0, "Multiplier")

// DEMA Settings
demaShort = input(20, "Short DEMA Length")
demaLong = input(50, "Long DEMA Length")

// Risk Management
stopLossPerc = input(2.0, "Stop Loss %") / 100
takeProfitPerc = input(4.0, "Take Profit %") / 100

// ===== INDICATOR CALCULATIONS =====
// MACD Calculation (similar to your example)
MACD = ta.ema(close, fastLength) - ta.ema(close, slowlength)
aMACD = ta.ema(MACD, MACDLength)
delta = MACD - aMACD

// Supertrend Calculation
atr = ta.atr(atrPeriod)
up = hl2 + (multiplier * atr)
dn = hl2 - (multiplier * atr)

up1 = 0.0
dn1 = 0.0
trend = 0
up1 := close[1] > up1[1] ? math.max(up, up1[1]) : up
dn1 := close[1] < dn1[1] ? math.min(dn, dn1[1]) : dn
trend := close > dn1[1] ? 1 : close < up1[1] ? -1 : nz(trend[1], 1)

// DEMA Calculation
demaShortVal = 2 * ta.ema(close, demaShort) - ta.ema(ta.ema(close, demaShort), demaShort)
demaLongVal = 2 * ta.ema(close, demaLong) - ta.ema(ta.ema(close, demaLong), demaLong)

// ===== STRATEGY CONDITIONS =====
// Alignment Conditions - ALL must be true
macdBullish = ta.crossover(delta, 0)
macdBearish = ta.crossunder(delta, 0)
supertrendBullish = trend == 1
supertrendBearish = trend == -1
demaBullish = demaShortVal > demaLongVal
demaBearish = demaShortVal < demaLongVal

// Final Entry Conditions with ALIGNMENT
longCondition = macdBullish and supertrendBullish and demaBullish
shortCondition = macdBearish and supertrendBearish and demaBearish

// ===== POSITION MANAGEMENT =====
var float longEntryPrice = 0.0
var float shortEntryPrice = 0.0

// Calculate TP/SL levels when entry occurs
if longCondition and strategy.position_size == 0
    longEntryPrice := close
    strategy.entry("Long", strategy.long, comment="L_Entry")
    
if shortCondition and strategy.position_size == 0  
    shortEntryPrice := close
    strategy.entry("Short", strategy.short, comment="S_Entry")

// Long Position TP/SL
longStopLoss = longEntryPrice * (1 - stopLossPerc)
longTakeProfit = longEntryPrice * (1 + takeProfitPerc)

// Short Position TP/SL  
shortStopLoss = shortEntryPrice * (1 + stopLossPerc)
shortTakeProfit = shortEntryPrice * (1 - takeProfitPerc)

// Exit conditions
if strategy.position_size > 0
    strategy.exit("Long Exit", "Long", stop=longStopLoss, limit=longTakeProfit, comment="L_Exit")
    
if strategy.position_size < 0
    strategy.exit("Short Exit", "Short", stop=shortStopLoss, limit=shortTakeProfit, comment="S_Exit")

// ===== PLOTTING =====
// Plot DEMAs
plot(demaShortVal, color=color.blue, linewidth=2, title="Short DEMA")
plot(demaLongVal, color=color.red, linewidth=2, title="Long DEMA")

// Plot Supertrend
supertrendLine = trend == 1 ? up1 : dn1
plot(supertrendLine, color=trend == 1 ? color.green : color.red, linewidth=2, title="Supertrend")

// Plot entry signals
plotshape(longCondition, style=shape.triangleup, location=location.belowbar, color=color.green, size=size.small, title="Long Signal")
plotshape(shortCondition, style=shape.triangledown, location=location.abovebar, color=color.red, size=size.small, title="Short Signal")

// Background for alignment
bgcolor(longCondition ? color.new(color.green, 90) : shortCondition ? color.new(color.red, 90) : na)