ORB - Opening Range Breakout

// This Pine Script™ code is subject to the terms of the Mozilla Public License 2.0
// © TradingTools

//@version=5
strategy("ORB - Opening Range Breakout", overlay=true, default_qty_type=strategy.percent_of_equity, default_qty_value=100)

// ─── Inputs ───
orbMinutes      = input.int(15, "Opening Range (minutes)", minval=5, step=5, group="ORB Settings")
sessionStart    = input.session("0930-0945", "Opening Range Session", group="ORB Settings")
tradeSession    = input.session("0930-1600", "Trading Session", group="ORB Settings")
useAtrSL        = input.bool(true, "Use ATR-based Stop Loss", group="Risk Management")
atrLength       = input.int(14, "ATR Length", group="Risk Management")
atrMult         = input.float(1.5, "ATR Multiplier for SL", step=0.1, group="Risk Management")
rrRatio         = input.float(2.0, "Risk:Reward Ratio", step=0.1, group="Risk Management")
showORB         = input.bool(true, "Show ORB Zone", group="Display")

// ─── Session Detection ───
isORBSession    = not na(time(timeframe.period, sessionStart))
isTradeSession  = not na(time(timeframe.period, tradeSession))

// ─── Opening Range Calculation ───
var float orbHigh = na
var float orbLow  = na
var bool  orbSet  = false

if isORBSession
    if not isORBSession[1]
        orbHigh := high
        orbLow  := low
        orbSet  := false
    else
        orbHigh := math.max(orbHigh, high)
        orbLow  := math.min(orbLow, low)
else if not isORBSession and isORBSession[1]
    orbSet := true

// ─── ATR for Stop Loss ───
atrVal = ta.atr(atrLength)

// ─── Entry Conditions ───
longCondition  = orbSet and isTradeSession and ta.crossover(close, orbHigh)
shortCondition = orbSet and isTradeSession and ta.crossunder(close, orbLow)

// ─── Execute Trades ───
if longCondition and strategy.position_size == 0
    stopLoss   = useAtrSL ? close - (atrVal * atrMult) : orbLow
    takeProfit = close + (close - stopLoss) * rrRatio
    strategy.entry("ORB Long", strategy.long)
    strategy.exit("ORB Long Exit", "ORB Long", stop=stopLoss, limit=takeProfit)

if shortCondition and strategy.position_size == 0
    stopLoss   = useAtrSL ? close + (atrVal * atrMult) : orbHigh
    takeProfit = close - (stopLoss - close) * rrRatio
    strategy.entry("ORB Short", strategy.short)
    strategy.exit("ORB Short Exit", "ORB Short", stop=stopLoss, limit=takeProfit)

// ─── Close at End of Session ───
if not isTradeSession and strategy.position_size != 0
    strategy.close_all("Session End")

// ─── Plotting ───
orbHighLine = plot(showORB and orbSet ? orbHigh : na, "ORB High", color=color.new(color.green, 0), linewidth=2, style=plot.style_linebr)
orbLowLine  = plot(showORB and orbSet ? orbLow : na, "ORB Low", color=color.new(color.red, 0), linewidth=2, style=plot.style_linebr)
fill(orbHighLine, orbLowLine, color=color.new(color.blue, 85), title="ORB Zone")

// ─── Alerts ───
alertcondition(longCondition, title="ORB Long Breakout", message="ORB: Price broke above Opening Range High")
alertcondition(shortCondition, title="ORB Short Breakdown", message="ORB: Price broke below Opening Range Low")