BB Breakout [trugurpala]

//@version=6
// Bollinger Band Breakout Strategy — github.com/trugurpala/pinescriptv6
// Author: Ugur Pala · mail@ugurpala.com
strategy("BB Breakout [trugurpala]",
    overlay=true, initial_capital=10000,
    default_qty_type=strategy.percent_of_equity, default_qty_value=10,
    commission_type=strategy.commission.percent, commission_value=0.1)

// ── Inputs ───────────────────────────────────────────────────────────────────
int   bbLen    = input.int(20,   "BB Length",  minval=1)
float bbMult   = input.float(2.0, "BB Mult",   step=0.1)
int   atrLen   = input.int(14,   "ATR Length", minval=1)
float slMult   = input.float(1.5, "SL Mult",   step=0.1)
float tpMult   = input.float(2.0, "TP Mult",   step=0.1)
bool  longOnly = input.bool(false, "Long Only")

// ── Calculations ─────────────────────────────────────────────────────────────
[upper, basis, lower] = ta.bb(close, bbLen, bbMult)
float atrVal    = ta.atr(atrLen)
bool  longEntry  = ta.crossover(close,  upper) and strategy.position_size == 0
bool  shortEntry = ta.crossunder(close, lower) 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 and not longOnly
    strategy.entry("Short", strategy.short)
    strategy.exit("Short Exit", "Short", stop=close + slMult * atrVal, limit=close - tpMult * atrVal)

// ── Visuals ──────────────────────────────────────────────────────────────────
p1 = plot(upper, "Upper", color.new(color.blue, 30))
p2 = plot(lower, "Lower", color.new(color.blue, 30))
plot(basis, "Basis", color.orange, linewidth=2)
fill(p1, p2, color.new(color.blue, 90))
plotshape(longEntry,  "Long",  shape.triangleup,   location.belowbar, color.green, size=size.normal)
plotshape(shortEntry, "Short", shape.triangledown, location.abovebar, color.red,   size=size.normal)