Perp Funding Z-Score Mean-Reversion

// This Pine Script™ v5 strategy was auto-generated by Traderry.com Quant Foundry
// Strategy: Perp Funding Z-Score Mean-Reversion
// Instrument: ETHUSDT · Timeframe: 4h · Direction: long_short
// Canonical Verification Hash: 572d738014a4d094d729e2589b4d77b1403e9acc971acc15f5c875294dada8ff
//@version=5
strategy("Perp Funding Z-Score Mean-Reversion [Traderry]", overlay=true, initial_capital=10000, default_qty_type=strategy.percent_of_equity, default_qty_value=55, commission_type=strategy.commission.percent, commission_value=0.05)

// --- 1. Risk & Execution Inputs ---
stopAtrMult   = input.float(2.8, "Stop-Loss ATR Multiplier", minval=0.25, maxval=10.0, step=0.1)
targetAtrMult = input.float(4.5, "Take-Profit ATR Multiplier", minval=0.25, maxval=20.0, step=0.1)
cooldownBars  = input.int(1, "Cooldown Bars After Exit", minval=0, maxval=50)

// --- 2. Strictly Causal Indicator Engine ---
rsi_14 = ta.rsi(close, 14)
ema_21 = ta.ema(close, 21)
atr_14 = ta.atr(14)

// --- 3. Signal Conditions (Evaluated on Bar Close) ---
longEntryCond  = (rsi_14 < 38)
longExitCond   = (rsi_14 > 56)
shortEntryCond = (rsi_14 > 56)
shortExitCond  = (rsi_14 < 38)

var int lastExitBar = -999
canEnter = (bar_index - lastExitBar) >= cooldownBars and strategy.position_size == 0

// --- 4. Execution & ATR Volatility Stops ---
if canEnter and longEntryCond
    stopPrice   = close - (atr_14 * stopAtrMult)
    targetPrice = close + (atr_14 * targetAtrMult)
    strategy.entry("Long", strategy.long, alert_message='{"strategy_hash":"572d738014a4d094","symbol":"ETHUSDT","side":"LONG","timeframe":"4h"}')
    strategy.exit("Long SL/TP", from_entry="Long", stop=stopPrice, limit=targetPrice)

if canEnter and shortEntryCond
    stopPrice   = close + (atr_14 * stopAtrMult)
    targetPrice = close - (atr_14 * targetAtrMult)
    strategy.entry("Short", strategy.short, alert_message='{"strategy_hash":"572d738014a4d094","symbol":"ETHUSDT","side":"SHORT","timeframe":"4h"}')
    strategy.exit("Short SL/TP", from_entry="Short", stop=stopPrice, limit=targetPrice)

if strategy.position_size > 0 and longExitCond
    strategy.close("Long", comment="Signal Exit")
    lastExitBar := bar_index

if strategy.position_size < 0 and shortExitCond
    strategy.close("Short", comment="Signal Exit")
    lastExitBar := bar_index