// Momentum Continuation Pro Algo
// Free use (GitHub release)
// Purpose: Momentum + structure confirmation tool (not signals)
// Notes: Designed for continuation conditions; avoid chop/range
// Use at your own risk. Not financial advice.


//@version=6
indicator("0-DTE Momentum Continuation Pro v4 (A+)", overlay=true)

//━━━━━━━━━━━━━━━━━━━
// INPUTS
//━━━━━━━━━━━━━━━━━━━
emaFastLen = input.int(9, "EMA Fast")
emaSlowLen = input.int(21, "EMA Slow")

volLen = input.int(20, "Volume MA Length")
atrLen = input.int(14, "ATR Length")
atrStopMult = input.float(0.75, "ATR Premium Protection")

useVWAP = input.bool(true, "Use VWAP")
useHTF = input.bool(true, "Use 15m HTF Bias")

//━━━━━━━━━━━━━━━━━━━
// TIME FILTER (0-DTE SAFE)
//━━━━━━━━━━━━━━━━━━━
tradeSession =
     (hour(time) == 9 and minute(time) >= 35) or
     (hour(time) > 9 and hour(time) < 11) or
     (hour(time) == 11 and minute(time) <= 30) or
     (hour(time) >= 13 and hour(time) < 15) or
     (hour(time) == 15 and minute(time) <= 30)

//━━━━━━━━━━━━━━━━━━━
// INDICATORS
//━━━━━━━━━━━━━━━━━━━
emaFast = ta.ema(close, emaFastLen)
emaSlow = ta.ema(close, emaSlowLen)
vwapVal = ta.vwap(hlc3)

atr = ta.atr(atrLen)
atrMA = ta.sma(atr, atrLen)

volMA = ta.sma(volume, volLen)
highVolume = volume > volMA

//━━━━━━━━━━━━━━━━━━━
// HTF BIAS (NON-REPAINT)
//━━━━━━━━━━━━━━━━━━━
htfEmaFast = request.security(syminfo.tickerid, "15", ta.ema(close, emaFastLen))
htfEmaSlow = request.security(syminfo.tickerid, "15", ta.ema(close, emaSlowLen))

htfBull = not useHTF or htfEmaFast > htfEmaSlow
htfBear = not useHTF or htfEmaFast < htfEmaSlow

//━━━━━━━━━━━━━━━━━━━
// MOMENTUM LOGIC
//━━━━━━━━━━━━━━━━━━━
bullTrend = emaFast > emaSlow
bearTrend = emaFast < emaSlow

bullMomentum = close > emaFast and close > emaSlow
bearMomentum = close < emaFast and close < emaSlow

vwapBull = not useVWAP or close > vwapVal
vwapBear = not useVWAP or close < vwapVal

atrExpanding = atr > atrMA

strongBullCandle = close > open and close > high - (high - low) * 0.3
strongBearCandle = close < open and close < low + (high - low) * 0.3

//━━━━━━━━━━━━━━━━━━━
// TREND STRENGTH SCORE (0–100)
//━━━━━━━━━━━━━━━━━━━
emaStrength = math.min(25, math.abs(emaFast - emaSlow) / atr * 25)
vwapStrength = math.min(25, math.abs(close - vwapVal) / atr * 25)
volStrength = highVolume ? 25 : 0
atrStrength = atrExpanding ? 25 : 0

trendScore = emaStrength + vwapStrength + volStrength + atrStrength

isAPlus = trendScore >= 75
isBPlus = trendScore >= 60 and trendScore < 75

//━━━━━━━━━━━━━━━━━━━
// ENTRY SIGNALS
//━━━━━━━━━━━━━━━━━━━
buySignal =
     tradeSession and
     bullTrend and
     bullMomentum and
     vwapBull and
     strongBullCandle and
     htfBull

sellSignal =
     tradeSession and
     bearTrend and
     bearMomentum and
     vwapBear and
     strongBearCandle and
     htfBear

//━━━━━━━━━━━━━━━━━━━
// POSITION TRACKING
//━━━━━━━━━━━━━━━━━━━
var int position = 0
var float entryPrice = na

if buySignal and position == 0
    position := 1
    entryPrice := close

if sellSignal and position == 0
    position := -1
    entryPrice := close

exitLong =
     position == 1 and (
         close < emaFast or
         (useVWAP and close < vwapVal) or
         close < entryPrice - atr * atrStopMult
     )

exitShort =
     position == -1 and (
         close > emaFast or
         (useVWAP and close > vwapVal) or
         close > entryPrice + atr * atrStopMult
     )

if exitLong or exitShort
    position := 0
    entryPrice := na

//━━━━━━━━━━━━━━━━━━━
// VISUALS
//━━━━━━━━━━━━━━━━━━━
plot(emaFast, color=color.orange, linewidth=2)
plot(emaSlow, color=color.blue, linewidth=2)
plot(useVWAP ? vwapVal : na, color=color.purple, linewidth=2)

plotshape(buySignal and isAPlus, style=shape.labelup,
     color=color.lime, text="A+ BUY", location=location.belowbar)

plotshape(buySignal and isBPlus, style=shape.labelup,
     color=color.green, text="B BUY", location=location.belowbar)

plotshape(sellSignal and isAPlus, style=shape.labeldown,
     color=color.red, text="A+ SELL", location=location.abovebar)

plotshape(sellSignal and isBPlus, style=shape.labeldown,
     color=color.maroon, text="B SELL", location=location.abovebar)

plotshape(exitLong or exitShort, style=shape.xcross,
     color=color.yellow, size=size.small)