Chandelier Exit - Eterna

//@version=5
strategy("Chandelier Exit - Eterna", 
         overlay=true, 
         initial_capital=10000,
         default_qty_type=strategy.percent_of_equity, 
         default_qty_value=10,
         commission_type=strategy.commission.percent,
         commission_value=0.075)

// ==================== Parameters ====================
atrLength = input.int(22, "ATR Length", minval=1)
atrMultiplier = input.float(3.0, "ATR Multiplier", minval=0.5, step=0.1)
trendEMA = input.int(50, "Trend Filter EMA", minval=1)
useTrendFilter = input.bool(true, "Use EMA Trend Filter")
leverage = input.int(5, "Leverage", minval=1, maxval=100)
positionSize = input.float(0.01, "Position Size", minval=0.001, step=0.001)

webhookMessage = input.string('{"action":"{{strategy.order.action}}", "symbol":"{{ticker}}", "size":' + str.tostring(positionSize) + ', "leverage":' + str.tostring(leverage) + '}', 
                               "Webhook JSON", group="Webhook")

// ==================== Chandelier Calculation ====================
atrValue = ta.atr(atrLength)

// Chandelier Exit Long: Highest high - (ATR × Multiplier)
highestHigh = ta.highest(high, atrLength)
chandelierLong = highestHigh - (atrValue * atrMultiplier)

// Chandelier Exit Short: Lowest low + (ATR × Multiplier)
lowestLow = ta.lowest(low, atrLength)
chandelierShort = lowestLow + (atrValue * atrMultiplier)

// Trend filter
emaFilter = ta.ema(close, trendEMA)
uptrend = close > emaFilter
downtrend = close < emaFilter

// ==================== Entry Conditions ====================
// Long entry: Price crosses above Chandelier Long line
longBreakout = ta.crossover(close, chandelierLong)
longCondition = useTrendFilter ? (longBreakout and uptrend) : longBreakout

// Short entry: Price crosses below Chandelier Short line
shortBreakdown = ta.crossunder(close, chandelierShort)
shortCondition = useTrendFilter ? (shortBreakdown and downtrend) : shortBreakdown

// Exit: Price crosses back through respective Chandelier line
exitLong = ta.crossunder(close, chandelierLong)
exitShort = ta.crossover(close, chandelierShort)

// ==================== Strategy Execution ====================
if longCondition
    strategy.entry("Long", strategy.long, alert_message=str.replace(webhookMessage, "{{strategy.order.action}}", "buy"))

if shortCondition
    strategy.entry("Short", strategy.short, alert_message=str.replace(webhookMessage, "{{strategy.order.action}}", "sell"))

if exitLong
    strategy.close("Long", alert_message='{"action":"close", "symbol":"{{ticker}}"}')

if exitShort
    strategy.close("Short", alert_message='{"action":"close", "symbol":"{{ticker}}"}')

// ==================== Plotting ====================
// Plot Chandelier lines
longStopPlot = plot(chandelierLong, "Chandelier Long Stop", color=color.green, linewidth=2, style=plot.style_stepline)
shortStopPlot = plot(chandelierShort, "Chandelier Short Stop", color=color.red, linewidth=2, style=plot.style_stepline)

// Plot trend filter
plot(useTrendFilter ? emaFilter : na, "Trend EMA", color=color.orange, linewidth=1)

// Entry signals
plotshape(longCondition, "Long Entry", shape.triangleup, location.belowbar, color.green, size=size.normal)
plotshape(shortCondition, "Short Entry", shape.triangledown, location.abovebar, color.red, size=size.normal)

// Exit signals
plotshape(exitLong and strategy.position_size > 0, "Long Exit", shape.xcross, location.abovebar, color.red, size=size.small)
plotshape(exitShort and strategy.position_size < 0, "Short Exit", shape.xcross, location.belowbar, color.green, size=size.small)

// Fill between chandelier lines
fill(longStopPlot, shortStopPlot, color=color.new(color.gray, 90))

// Background color based on position
positionBg = strategy.position_size > 0 ? color.new(color.green, 95) : strategy.position_size < 0 ? color.new(color.red, 95) : color.new(color.gray, 98)
bgcolor(positionBg)

// Show ATR value
var label atrLabel = na
if bar_index % 30 == 0
    label.delete(atrLabel)
    atrLabel := label.new(bar_index, low, "ATR: " + str.tostring(atrValue, "#.##"), 
                          color=color.blue, textcolor=color.white, size=size.small, style=label.style_label_up)