EUR/USD Forex Strategy [trugurpala]

//@version=6
// EUR/USD Forex Strategy — London + NY Session
// github.com/trugurpala/pinescriptv6 — Author: Ugur Pala
//
// TR: Sembol: FX:EURUSD / OANDA:EURUSD / FXCM:EURUSD
// EN: Symbol: FX:EURUSD / OANDA:EURUSD / FXCM:EURUSD
//
// En Aktif Seanslar / Most Active Sessions:
// London: 08:00–16:00 GMT
// New York: 13:00–21:00 GMT
// Overlap (en iyi): 13:00–16:00 GMT
strategy("EUR/USD Forex Strategy [trugurpala]",
    overlay           = true,
    initial_capital   = 10000,
    default_qty_type  = strategy.percent_of_equity,
    default_qty_value = 2,
    commission_type   = strategy.commission.percent,
    commission_value  = 0.005,  // ~0.5 pip spread
    slippage          = 1)

// ── Inputs ───────────────────────────────────────────────────────────────────
int   fastLen   = input.int(9,    "Fast EMA",  minval=1)
int   slowLen   = input.int(21,   "Slow EMA",  minval=1)
int   atrLen    = input.int(14,   "ATR",       minval=1)
float slMult    = input.float(1.5, "SL Mult",  step=0.1)
float tpMult    = input.float(2.0, "TP Mult",  step=0.1)

// ── London + NY Seans Filtresi ────────────────────────────────────────────────
bool london = not na(time(timeframe.period, "0800-1600", "GMT"))
bool newYork = not na(time(timeframe.period, "1300-2100", "GMT"))
bool inSession = london or newYork

// ── Hesaplamalar ──────────────────────────────────────────────────────────────
float fastEma  = ta.ema(close, fastLen)
float slowEma  = ta.ema(close, slowLen)
float atrVal   = ta.atr(atrLen)

bool bullCross = ta.crossover(fastEma,  slowEma) and inSession
bool bearCross = ta.crossunder(fastEma, slowEma) and inSession

// ── Entries ──────────────────────────────────────────────────────────────────
if bullCross
    strategy.entry("Long", strategy.long)
    strategy.exit("Long Exit", "Long",
        stop  = close - slMult * atrVal,
        limit = close + tpMult * atrVal)

if bearCross
    strategy.entry("Short", strategy.short)
    strategy.exit("Short Exit", "Short",
        stop  = close + slMult * atrVal,
        limit = close - tpMult * atrVal)

// ── Visuals ──────────────────────────────────────────────────────────────────
bgcolor(london and newYork ? color.new(color.green, 96) : // Overlap — en aktif
        inSession           ? color.new(color.blue, 96)  :
                              color.new(color.gray, 97))
plot(fastEma, "Fast", fastEma > slowEma ? color.green : color.red,    linewidth=2)
plot(slowEma, "Slow", fastEma > slowEma ? color.lime  : color.orange, linewidth=2)
plotshape(bullCross, "Long",  shape.triangleup,   location.belowbar, color.green)
plotshape(bearCross, "Short", shape.triangledown, location.abovebar, color.red)