Morning Doji Star - Bull

//@version=5
indicator("Morning Doji Star - Bullish", shorttitle = "Morning Doji Star - Bull", overlay=true)

C_DownTrend = true
C_UpTrend = true
var trendRule1 = "SMA50"
var trendRule2 = "SMA50, SMA200"
var trendRule = input.string(trendRule1, "Detect Trend Based On", options=[trendRule1, trendRule2, "No detection"])

if trendRule == trendRule1
    priceAvg = ta.sma(close, 50)
    C_DownTrend := close < priceAvg
    C_UpTrend := close > priceAvg

if trendRule == trendRule2
    sma200 = ta.sma(close, 200)
    sma50 = ta.sma(close, 50)
    C_DownTrend := close < sma50 and sma50 < sma200
    C_UpTrend := close > sma50 and sma50 > sma200
C_Len = 14 // ta.ema depth for bodyAvg
C_ShadowPercent = 5.0 // size of shadows
C_ShadowEqualsPercent = 100.0
C_DojiBodyPercent = 5.0
C_Factor = 2.0 // shows the number of times the shadow dominates the candlestick body

C_BodyHi = math.max(close, open)
C_BodyLo = math.min(close, open)
C_Body = C_BodyHi - C_BodyLo
C_BodyAvg = ta.ema(C_Body, C_Len)
C_SmallBody = C_Body < C_BodyAvg
C_LongBody = C_Body > C_BodyAvg
C_UpShadow = high - C_BodyHi
C_DnShadow = C_BodyLo - low
C_HasUpShadow = C_UpShadow > C_ShadowPercent / 100 * C_Body
C_HasDnShadow = C_DnShadow > C_ShadowPercent / 100 * C_Body
C_WhiteBody = open < close
C_BlackBody = open > close
C_Range = high-low
C_IsInsideBar = C_BodyHi[1] > C_BodyHi and C_BodyLo[1] < C_BodyLo
C_BodyMiddle = C_Body / 2 + C_BodyLo
C_ShadowEquals = C_UpShadow == C_DnShadow or (math.abs(C_UpShadow - C_DnShadow) / C_DnShadow * 100) < C_ShadowEqualsPercent and (math.abs(C_DnShadow - C_UpShadow) / C_UpShadow * 100) < C_ShadowEqualsPercent
C_IsDojiBody = C_Range > 0 and C_Body <= C_Range * C_DojiBodyPercent / 100
C_Doji = C_IsDojiBody and C_ShadowEquals

patternLabelPosLow = low - (ta.atr(30) * 0.6)
patternLabelPosHigh = high + (ta.atr(30) * 0.6)

label_color_bullish = input(color.blue, "Label Color Bullish")
C_MorningDojiStarBullishNumberOfCandles = 3
C_MorningDojiStarBullish = false
if C_LongBody[2] and C_IsDojiBody[1] and C_LongBody and C_DownTrend and C_BlackBody[2] and C_BodyHi[1] < C_BodyLo[2] and C_WhiteBody and C_BodyHi >= C_BodyMiddle[2] and C_BodyHi < C_BodyHi[2] and C_BodyHi[1] < C_BodyLo
    C_MorningDojiStarBullish := true
alertcondition(C_MorningDojiStarBullish, title = "New pattern detected", message = "New Morning Doji Star – Bullish pattern detected")
if C_MorningDojiStarBullish
    var ttBullishMorningDojiStar = "Morning Doji Star\nThis candlestick pattern is a variation of the Morning Star pattern. A three-day bullish reversal pattern, which consists of three candlesticks will look something like this: The first being a long-bodied red candle that extends the current downtrend. Next comes a Doji that gaps down on the open. After that comes a long-bodied green candle, which gaps up on the open and closes above the midpoint of the body of the first day. It is more bullish than the regular morning star pattern because of the existence of the Doji."
    label.new(bar_index, patternLabelPosLow, text="MDS", style=label.style_label_up, color = label_color_bullish, textcolor=color.white, tooltip = ttBullishMorningDojiStar)
bgcolor(ta.highest(C_MorningDojiStarBullish?1:0, C_MorningDojiStarBullishNumberOfCandles)!=0 ? color.new(color.blue, 90) : na, offset=-(C_MorningDojiStarBullishNumberOfCandles-1))