Nikkei Japan Strategy [trugurpala]

//@version=6
// Nikkei 225 / JP225 Strategy
// github.com/trugurpala/pinescriptv6 — Author: Ugur Pala
//
// TR: Semboller: TVC:NI225 / OSAKA:NK1! / SPREADEX:JP225
// EN: Symbols:  TVC:NI225 / OSAKA:NK1! / SPREADEX:JP225
//
// Seans / Session: 09:00–15:30 JST (00:00–06:30 GMT)
// BOJ faiz kararları ve USD/JPY korelasyonuna dikkat
// Watch BOJ rate decisions and USD/JPY correlation
strategy("Nikkei Japan Strategy [trugurpala]",
    overlay           = true,
    initial_capital   = 10000,
    default_qty_type  = strategy.percent_of_equity,
    default_qty_value = 5,
    commission_type   = strategy.commission.percent,
    commission_value  = 0.05,
    slippage          = 2)

// ── 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(2.5, "TP Mult",  step=0.1)

// ── TSE Seans: 09:00–15:30 JST (=00:00–06:30 GMT) ───────────────────────────
bool inSession = not na(time(timeframe.period, "0900-1530", "Asia/Tokyo"))
bool sesEnd    = inSession[1] and not inSession
if sesEnd
    strategy.close_all(comment="TSE Close")

// ── 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(inSession ? na : color.new(color.gray, 96))
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)