GBP/USD Market Structure [trugurpala]

//@version=6
// GBP/USD — Market Structure + EMA Filter Strategy
// Author: Ugur Pala · github.com/trugurpala/pinescriptv6
// TradingView: https://tr.tradingview.com/u/trugurpala/
//
// TR: Pivot high/low kırılması ile market structure takibi.
//     EMA filtresi ile trend yönünde işlem alınır.
//     Cable (GBP/USD) için London seansında en etkili.
// EN: Market structure tracking via pivot high/low breakouts.
//     EMA filter ensures trading in trend direction.
//     Most effective during London session for Cable.
//
// Sembol / Symbol: FX:GBPUSD / OANDA:GBPUSD
// Önerilen TF / Recommended TF: 1H, 4H
strategy("GBP/USD Market Structure [trugurpala]",
    overlay           = true,
    initial_capital   = 10000,
    default_qty_type  = strategy.percent_of_equity,
    default_qty_value = 2,
    commission_type   = strategy.commission.percent,
    commission_value  = 0.006,
    slippage          = 1)

// ── Inputs ───────────────────────────────────────────────────────────────────
int   pivotLen  = input.int(5,   "Pivot Lookback", minval=2)
int   trendLen  = input.int(50,  "Trend EMA",      minval=10)
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)

// ── London + NY Seans ─────────────────────────────────────────────────────────
bool inSession  = not na(time(timeframe.period, "0700-2000", "GMT"))

// ── Calculations ─────────────────────────────────────────────────────────────
float trendEma  = ta.ema(close, trendLen)
float atrVal    = ta.atr(atrLen)

float pivHigh   = ta.pivothigh(high, pivotLen, pivotLen)
float pivLow    = ta.pivotlow(low,   pivotLen, pivotLen)

var float lastPH = na
var float lastPL = na

if not na(pivHigh)
    lastPH := high[pivotLen]
if not na(pivLow)
    lastPL := low[pivotLen]

// Kırılma sinyalleri — trend yönünde
bool bullBreak = not na(lastPH)
                    and ta.crossover(close, lastPH)
                    and close > trendEma
                    and inSession
                    and strategy.position_size == 0

bool bearBreak = not na(lastPL)
                    and ta.crossunder(close, lastPL)
                    and close < trendEma
                    and inSession
                    and strategy.position_size == 0

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

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

// ── Visuals ──────────────────────────────────────────────────────────────────
plot(trendEma, "Trend EMA", color.new(color.orange, 20), linewidth=2)
plotshape(not na(pivHigh), "Pivot High", shape.triangledown,
    location.abovebar, color.new(color.red,   40), size=size.tiny)
plotshape(not na(pivLow),  "Pivot Low",  shape.triangleup,
    location.belowbar, color.new(color.green, 40), size=size.tiny)
plotshape(bullBreak, "Long",  shape.triangleup,   location.belowbar, color.green, size=size.normal)
plotshape(bearBreak, "Short", shape.triangledown, location.abovebar, color.red,   size=size.normal)
bgcolor(not inSession ? color.new(color.gray, 96) : na)

// ── Alerts (alert() — strategy içinde çalışır) ───────────────────────────────
if bullBreak
    alert("GBP/USD Structure Break Long — " + str.tostring(close, "#.#####"), alert.freq_once_per_bar)
if bearBreak
    alert("GBP/USD Structure Break Short — " + str.tostring(close, "#.#####"), alert.freq_once_per_bar)