Chandelier Exit [trugurpala]

//@version=6
// Chandelier Exit — Trend Trailing Stop
// github.com/trugurpala/pinescriptv6 — Author: Ugur Pala
indicator("Chandelier Exit [trugurpala]", overlay=true)

// ── Inputs ───────────────────────────────────────────────────────────────────
int   atrLen  = input.int(22,   "ATR Length",    minval=1)
float atrMult = input.float(3.0, "ATR Multiplier", step=0.1)
bool  showDir = input.bool(true, "Show Direction Labels")

// ── Calculations ─────────────────────────────────────────────────────────────
float atr      = ta.atr(atrLen)
float longStop  = ta.highest(high, atrLen) - atrMult * atr
float shortStop = ta.lowest(low,  atrLen)  + atrMult * atr

var float chandLong  = na
var float chandShort = na
var int   direction  = 1

chandLong  := longStop  > nz(chandLong[1],  longStop)  ? longStop  : nz(chandLong[1],  longStop)
chandShort := shortStop < nz(chandShort[1], shortStop) ? shortStop : nz(chandShort[1], shortStop)

if close > nz(chandShort[1], chandShort)
    direction := 1
if close < nz(chandLong[1],  chandLong)
    direction := -1

bool dirChange  = direction != direction[1]
bool bullChange = dirChange and direction ==  1
bool bearChange = dirChange and direction == -1

// ── Visuals ──────────────────────────────────────────────────────────────────
plot(direction == 1  ? chandLong  : na, "Long Stop",  color.green, linewidth=2, style=plot.style_linebr)
plot(direction == -1 ? chandShort : na, "Short Stop", color.red,   linewidth=2, style=plot.style_linebr)

if showDir
    if bullChange
        label.new(bar_index, low,  "●", style=label.style_label_up,
            color=color.new(color.green,20), textcolor=color.white)
    if bearChange
        label.new(bar_index, high, "●", style=label.style_label_down,
            color=color.new(color.red,20), textcolor=color.white)

alertcondition(bullChange, "CE Bull", "Chandelier Bull — {{ticker}} @ {{close}}")
alertcondition(bearChange, "CE Bear", "Chandelier Bear — {{ticker}} @ {{close}}")