Chaikin Oscillator - Eterna MCP

//@version=5
strategy("Chaikin Oscillator - Eterna MCP", 
         shorttitle="Chaikin",
         overlay=false,
         default_qty_type=strategy.percent_of_equity,
         default_qty_value=100,
         initial_capital=1000)

// ============================================
// PARAMETERS
// ============================================
fastLength = input.int(3, "Fast EMA Length", minval=1)
slowLength = input.int(10, "Slow EMA Length", minval=1)
signalThreshold = input.float(0, "Signal Threshold", step=0.0001)
divergenceLookback = input.int(5, "Divergence Lookback", minval=3)
leverageSize = input.float(5.0, "Leverage", minval=1, maxval=100)
positionSize = input.float(0.01, "Position Size", minval=0.001, maxval=1)

// ============================================
// ACCUMULATION/DISTRIBUTION LINE
// ============================================
// Money Flow Multiplier
mfm = ((close - low) - (high - close)) / (high - low)
// Money Flow Volume
mfv = mfm * volume
// Accumulation/Distribution Line
ad = ta.cum(mfv)

// ============================================
// CHAIKIN OSCILLATOR CALCULATION
// ============================================
fastEMA = ta.ema(ad, fastLength)
slowEMA = ta.ema(ad, slowLength)
chaikin = fastEMA - slowEMA

// ============================================
// SIGNAL GENERATION
// ============================================
// Zero-line crossovers
bullishCross = ta.crossover(chaikin, signalThreshold)
bearishCross = ta.crossunder(chaikin, signalThreshold)

// Momentum confirmation
bullishMomentum = chaikin > chaikin[1] and chaikin[1] > chaikin[2]
bearishMomentum = chaikin < chaikin[1] and chaikin[1] < chaikin[2]

// Divergence detection
priceLow = ta.lowest(low, divergenceLookback)
priceHigh = ta.highest(high, divergenceLookback)
chaikinLow = ta.lowest(chaikin, divergenceLookback)
chaikinHigh = ta.highest(chaikin, divergenceLookback)

// Bullish divergence: lower price, higher Chaikin
bullishDiv = low == priceLow and chaikin > chaikinLow and chaikin < 0
// Bearish divergence: higher price, lower Chaikin
bearishDiv = high == priceHigh and chaikin < chaikinHigh and chaikin > 0

// Combined entry signals
buySignal = (bullishCross and bullishMomentum) or bullishDiv
sellSignal = (bearishCross and bearishMomentum) or bearishDiv

// ============================================
// STRATEGY LOGIC
// ============================================
if buySignal and strategy.position_size == 0
    strategy.entry("Long", strategy.long)
    alert('{"action":"buy","symbol":"' + syminfo.ticker + '","size":' + str.tostring(positionSize) + ',"leverage":' + str.tostring(leverageSize) + '}', alert.freq_once_per_bar_close)

if sellSignal and strategy.position_size == 0
    strategy.entry("Short", strategy.short)
    alert('{"action":"sell","symbol":"' + syminfo.ticker + '","size":' + str.tostring(positionSize) + ',"leverage":' + str.tostring(leverageSize) + '}', alert.freq_once_per_bar_close)

// Exit on opposite signal
if sellSignal and strategy.position_size > 0
    strategy.close("Long")

if buySignal and strategy.position_size < 0
    strategy.close("Short")

// ============================================
// PLOTTING
// ============================================
plot(chaikin, "Chaikin Oscillator", color=chaikin >= 0 ? color.green : color.red, linewidth=2, style=plot.style_histogram)
hline(signalThreshold, "Zero Line", color=color.gray, linestyle=hline.style_solid, linewidth=2)

// Momentum line overlay
plot(chaikin, "Chaikin Line", color=color.blue, linewidth=1)

// Signals
plotshape(buySignal, "Buy", shape.triangleup, location.bottom, color.green, size=size.normal)
plotshape(sellSignal, "Sell", shape.triangledown, location.top, color.red, size=size.normal)

// Divergence markers
plotshape(bullishDiv, "Bullish Div", shape.diamond, location.bottom, color.lime, size=size.small)
plotshape(bearishDiv, "Bearish Div", shape.diamond, location.top, color.orange, size=size.small)

// Trend background
bgcolor(chaikin > 0 and bullishMomentum ? color.new(color.green, 97) : 
        chaikin < 0 and bearishMomentum ? color.new(color.red, 97) : na)