Williams %R Reversal - Eterna MCP

//@version=5
strategy("Williams %R Reversal - Eterna MCP", 
         shorttitle="Williams %R",
         overlay=false,
         default_qty_type=strategy.percent_of_equity,
         default_qty_value=100,
         initial_capital=1000)

// ============================================
// PARAMETERS
// ============================================
wrLength = input.int(14, "Williams %R Length", minval=1)
overboughtLevel = input.int(-20, "Overbought Level", minval=-50, maxval=0)
oversoldLevel = input.int(-80, "Oversold Level", minval=-100, maxval=-50)
confirmBars = input.int(2, "Confirmation Bars", minval=1, maxval=5)
leverageSize = input.float(5.0, "Leverage", minval=1, maxval=100)
positionSize = input.float(0.01, "Position Size", minval=0.001, maxval=1)

// ============================================
// WILLIAMS %R CALCULATION
// ============================================
upper = ta.highest(high, wrLength)
lower = ta.lowest(low, wrLength)
wr = -100 * (upper - close) / (upper - lower)

// ============================================
// REVERSAL DETECTION
// ============================================
// Bullish reversal: WR crosses above oversold level
bullishReversal = ta.crossover(wr, oversoldLevel)

// Bearish reversal: WR crosses below overbought level
bearishReversal = ta.crossunder(wr, overboughtLevel)

// Confirmation: price action supports reversal
var int bullishConfirm = 0
var int bearishConfirm = 0

if bullishReversal
    bullishConfirm := confirmBars
if bearishReversal
    bearishConfirm := confirmBars

if bullishConfirm > 0
    bullishConfirm := bullishConfirm - 1
if bearishConfirm > 0
    bearishConfirm := bearishConfirm - 1

// Strong signals: reversal with momentum
strongBullish = bullishReversal and wr < oversoldLevel and close > close[1]
strongBearish = bearishReversal and wr > overboughtLevel and close < close[1]

// ============================================
// STRATEGY LOGIC
// ============================================
if strongBullish and strategy.position_size == 0
    strategy.entry("Long", strategy.long)
    alert('{"action":"buy","symbol":"' + syminfo.ticker + '","size":' + str.tostring(positionSize) + ',"leverage":' + str.tostring(leverageSize) + '}', alert.freq_once_per_bar_close)

if strongBearish and strategy.position_size == 0
    strategy.entry("Short", strategy.short)
    alert('{"action":"sell","symbol":"' + syminfo.ticker + '","size":' + str.tostring(positionSize) + ',"leverage":' + str.tostring(leverageSize) + '}', alert.freq_once_per_bar_close)

// Exit on opposite reversal
if strongBearish and strategy.position_size > 0
    strategy.close("Long")

if strongBullish and strategy.position_size < 0
    strategy.close("Short")

// ============================================
// PLOTTING
// ============================================
plot(wr, "Williams %R", color=color.blue, linewidth=2)
hline(overboughtLevel, "Overbought", color=color.red, linestyle=hline.style_dashed)
hline(oversoldLevel, "Oversold", color=color.green, linestyle=hline.style_dashed)
hline(-50, "Midline", color=color.gray, linestyle=hline.style_dotted)

// Color zones
bgcolor(wr > overboughtLevel ? color.new(color.red, 95) : na)
bgcolor(wr < oversoldLevel ? color.new(color.green, 95) : na)

plotshape(strongBullish, "Buy", shape.triangleup, location.bottom, color.green, size=size.normal)
plotshape(strongBearish, "Sell", shape.triangledown, location.top, color.red, size=size.normal)