VWAP Bounce - Eterna

//@version=5
strategy("VWAP Bounce - 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 ====================
vwapDeviation = input.float(0.5, "VWAP Deviation %", minval=0.1, step=0.1)
trendEMA = input.int(50, "Trend EMA", minval=1)
leverage = input.int(5, "Leverage", minval=1, maxval=100)
positionSize = input.float(0.01, "Position Size", minval=0.001, step=0.001)

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

// ==================== Indicators ====================
vwapValue = ta.vwap(close)
ema50 = ta.ema(close, trendEMA)

// VWAP bands
vwapUpper = vwapValue * (1 + vwapDeviation / 100)
vwapLower = vwapValue * (1 - vwapDeviation / 100)

// ==================== Entry Conditions ====================
// Uptrend: Price above EMA and bounces off VWAP support
uptrend = close > ema50
longCondition = uptrend and ta.crossover(close, vwapLower) and low <= vwapLower

// Downtrend: Price below EMA and rejects from VWAP resistance
downtrend = close < ema50
shortCondition = downtrend and ta.crossunder(close, vwapUpper) and high >= vwapUpper

// Exit conditions
exitLong = ta.crossunder(close, vwapValue)
exitShort = ta.crossover(close, vwapValue)

// ==================== 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(vwapValue, "VWAP", color=color.blue, linewidth=2)
plot(vwapUpper, "VWAP Upper", color=color.new(color.blue, 70), style=plot.style_circles)
plot(vwapLower, "VWAP Lower", color=color.new(color.blue, 70), style=plot.style_circles)
plot(ema50, "Trend EMA", color=color.orange, linewidth=1)

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

// Fill between bands
upperBand = plot(vwapUpper, display=display.none)
lowerBand = plot(vwapLower, display=display.none)
fill(upperBand, lowerBand, color=color.new(color.blue, 95))

bgcolor(uptrend ? color.new(color.green, 97) : color.new(color.red, 97))