//@version=5
strategy("Modern Bearish Order Block with FVG", overlay=true, initial_capital=10000, default_qty_type=strategy.percent_of_equity, default_qty_value=10)

// Inputs
useFilter = input.bool(true, "Use EMA Trend Filter")
emaPeriod = input.int(200, "EMA Period")
tpMultiplier = input.float(2.0, "Risk-to-Reward Multiplier")

// EMA Calculations
emaVal = ta.ema(close, emaPeriod)
isBearishTrend = not useFilter or (close < emaVal)

// Bearish Order Block & FVG Detection (3-candle sequence)
// Candle 2 (OB): Bullish Candle
// Candle 1 (Engulfing): Bearish candle that engulfs the OB Candle's low
// Candle 0: Bearish candle confirming the FVG
isOB = (close[2] > open[2])
isEngulfing = (close[1] < open[1]) and (close[1] < low[2])
hasFVG = (low[2] > high[0])

var float obHigh = na
var float obLow = na
var float obSL = na
var float obTP = na
var bool pendingSetup = false

// Set setup conditions when a valid pattern is identified
if isBearishTrend and isOB and isEngulfing and hasFVG
    obHigh := high[2]
    obLow := low[2]
    obSL := obHigh + (obHigh - obLow)
    obTP := obLow - (tpMultiplier * (obHigh - obLow))
    pendingSetup := true

// Invalidate setup if price moves past our Stop Loss before hitting the Entry Level (High of OB)
if pendingSetup and high > obSL
    pendingSetup := false

// Entry Order logic
if pendingSetup
    strategy.entry("OB_Sell_Limit", strategy.short, limit=obHigh, comment="Bearish OB Entry")

// Exit Order management
if strategy.position_size < 0
    strategy.exit("OB_Exit", "OB_Sell_Limit", stop=obSL, limit=obTP, comment="OB Close")
    
    // Clear state when position is closed
    if strategy.position_size == 0
        pendingSetup := false

// Visualizations
plot(pendingSetup ? obHigh : na, color=color.new(color.red, 0), linewidth=2, title="OB Entry (High)")
plot(pendingSetup ? obSL : na, color=color.new(color.maroon, 0), linewidth=2, style=plot.style_line, title="OB Stop Loss")
plot(pendingSetup ? obTP : na, color=color.new(color.green, 0), linewidth=2, style=plot.style_line, title="OB Take Profit")