USD/JPY Carry Trend [trugurpala]

//@version=6
// USD/JPY — Carry Trade Trend Following Strategy
// Author: Ugur Pala · github.com/trugurpala/pinescriptv6
// TradingView: https://tr.tradingview.com/u/trugurpala/
//
// TR: USD/JPY için özel carry trade trend stratejisi.
//     Tokyo ve Londra seanslarında çalışır.
//     BOJ müdahalelerine karşı geniş ATR stop kullanır.
//     Hızlı trend değişimlerinde pozisyon kapatır.
// EN: Carry trade trend strategy specific to USD/JPY.
//     Active during Tokyo and London sessions.
//     Wide ATR stop as protection against BOJ interventions.
//     Exits on fast trend reversal signals.
//
// Sembol / Symbol: FX:USDJPY / OANDA:USDJPY
// Önerilen TF / Recommended TF: 1H, 4H
strategy("USD/JPY Carry Trend [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,
    slippage          = 1)

// ── Inputs ───────────────────────────────────────────────────────────────────
int   fastLen   = input.int(9,    "Fast EMA",              minval=1)
int   slowLen   = input.int(21,   "Slow EMA",              minval=1)
int   trendLen  = input.int(100,  "Trend EMA",             minval=20)
int   rsiLen    = input.int(14,   "RSI",                   minval=1)
float rsiMid    = input.float(50, "RSI Mid",               minval=40, maxval=60)
int   atrLen    = input.int(14,   "ATR",                   minval=1)
float slMult    = input.float(2.5, "SL Mult (wide/BOJ)",   step=0.1)
float tpMult    = input.float(3.0, "TP Mult",              step=0.1)

// ── Tokyo + London Seans ──────────────────────────────────────────────────────
bool tokyo      = not na(time(timeframe.period, "0000-0900", "GMT"))
bool london     = not na(time(timeframe.period, "0800-1600", "GMT"))
bool inSession  = tokyo or london

// ── Calculations ─────────────────────────────────────────────────────────────
float fastEma   = ta.ema(close, fastLen)
float slowEma   = ta.ema(close, slowLen)
float trendEma  = ta.ema(close, trendLen)
float rsi       = ta.rsi(close, rsiLen)
float atrVal    = ta.atr(atrLen)

bool upTrend    = close > trendEma and fastEma > slowEma
bool downTrend  = close < trendEma and fastEma < slowEma

bool longEntry  = ta.crossover(fastEma, slowEma)
                    and upTrend and rsi > rsiMid
                    and inSession and strategy.position_size == 0

bool shortEntry = ta.crossunder(fastEma, slowEma)
                    and downTrend and rsi < rsiMid
                    and inSession and strategy.position_size == 0

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

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

// Trend bozulunca kapat / Close on trend break
if strategy.position_size > 0 and ta.crossunder(fastEma, slowEma)
    strategy.close("Long",  comment="Trend Break")
if strategy.position_size < 0 and ta.crossover(fastEma, slowEma)
    strategy.close("Short", comment="Trend Break")

// ── Visuals ──────────────────────────────────────────────────────────────────
plot(fastEma,  "Fast",  fastEma > slowEma ? color.green : color.red,    linewidth=1)
plot(slowEma,  "Slow",  fastEma > slowEma ? color.lime  : color.orange, linewidth=2)
plot(trendEma, "Trend", color.new(color.gray, 30),                      linewidth=2)
bgcolor(tokyo and london ? color.new(color.purple, 93) :
        inSession         ? color.new(color.blue,   96) :
                            color.new(color.gray,   97))
plotshape(longEntry,  "Long",  shape.triangleup,   location.belowbar, color.green, size=size.normal)
plotshape(shortEntry, "Short", shape.triangledown, location.abovebar, color.red,   size=size.normal)

// ── Alerts (alert() — strategy içinde çalışır) ───────────────────────────────
if longEntry
    alert("USD/JPY Carry Trend Long — " + str.tostring(close, "#.###"), alert.freq_once_per_bar)
if shortEntry
    alert("USD/JPY Carry Trend Short — " + str.tostring(close, "#.###"), alert.freq_once_per_bar)