//@version=6
indicator("WEAI Pro — Smart Money Engine", "WEAI Pro", overlay = true, max_labels_count = 200)
orbSession = input.session("0930-1000", "ORB Session / 오프닝 레인지")
htf = input.timeframe("240", "Higher timeframe / 상위 시간봉")
volLen = input.int(20, "Relative volume length")
emaFast = ta.ema(close, 20)
emaSlow = ta.ema(close, 50)
vwapValue = ta.vwap(hlc3)
htfClose = request.security(syminfo.tickerid, htf, close, lookahead = barmerge.lookahead_off)
htfEma = request.security(syminfo.tickerid, htf, ta.ema(close, 50), lookahead = barmerge.lookahead_off)
relVol = volume / math.max(ta.sma(volume, volLen), 1)
inOrb = not na(time(timeframe.period, orbSession))
newOrb = inOrb and not inOrb[1]
var float orbHigh = na
var float orbLow = na
if newOrb
    orbHigh := high
    orbLow := low
else if inOrb
    orbHigh := math.max(orbHigh, high)
    orbLow := math.min(orbLow, low)
liquiditySweepLow = low < ta.lowest(low[1], 10) and close > open and relVol > 1.2
liquiditySweepHigh = high > ta.highest(high[1], 10) and close < open and relVol > 1.2
longSignal = close > orbHigh and emaFast > emaSlow and close > vwapValue and htfClose > htfEma and relVol > 1.1
shortSignal = close < orbLow and emaFast < emaSlow and close < vwapValue and htfClose < htfEma and relVol > 1.1
plot(emaFast, "EMA 20", color.rgb(75, 145, 255), 2)
plot(emaSlow, "EMA 50", color.rgb(150, 165, 185), 2)
plot(vwapValue, "VWAP", color.rgb(200, 169, 107), 2)
plot(orbHigh, "ORB High", color.new(color.aqua, 20), style = plot.style_stepline)
plot(orbLow, "ORB Low", color.new(color.red, 20), style = plot.style_stepline)
plotshape(liquiditySweepLow, "Sell-side sweep", shape.circle, location.belowbar, color.aqua, size = size.tiny, text = "SSL")
plotshape(liquiditySweepHigh, "Buy-side sweep", shape.circle, location.abovebar, color.fuchsia, size = size.tiny, text = "BSL")
plotshape(longSignal and not longSignal[1], "Pro Long", shape.labelup, location.belowbar, color.rgb(50, 185, 140), text = "WEAI PRO\nLONG", textcolor = color.white, size = size.tiny)
plotshape(shortSignal and not shortSignal[1], "Pro Short", shape.labeldown, location.abovebar, color.rgb(215, 70, 90), text = "WEAI PRO\nSHORT", textcolor = color.white, size = size.tiny)
alertcondition(longSignal and not longSignal[1], "WEAI Pro Long", "WEAI Pro: institutional conditions aligned LONG on {{ticker}} {{interval}}")
alertcondition(shortSignal and not shortSignal[1], "WEAI Pro Short", "WEAI Pro: institutional conditions aligned SHORT on {{ticker}} {{interval}}")
alertcondition(liquiditySweepLow or liquiditySweepHigh, "WEAI Liquidity Sweep", "WEAI Pro: liquidity sweep detected on {{ticker}} {{interval}}")