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For bearish:
//@version=4
study("Engulfing - Bearish", shorttitle = "Engulfing - Bear", overlay=true)
C_DownTrend = true
C_UpTrend = true
var trendRule1 = "SMA50"
var trendRule2 = "SMA50, SMA200"
var trendRule = input(trendRule1, "Detect Trend Based On", options=[trendRule1, trendRule2, "No detection"])
if trendRule == trendRule1
priceAvg = sma(close, 50)
C_DownTrend := close < priceAvg
C_UpTrend := close > priceAvg
if trendRule == trendRule2
sma200 = sma(close, 200)
sma50 = sma(close, 50)
C_DownTrend := close < sma50 and sma50 < sma200
C_UpTrend := close > sma50 and sma50 > sma200
C_Len = 14 // 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 = max(close, open)
C_BodyLo = min(close, open)
C_Body = C_BodyHi - C_BodyLo
C_BodyAvg = 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 (abs(C_UpShadow - C_DnShadow) / C_DnShadow * 100) < C_ShadowEqualsPercent and (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 - (atr(30) * 0.6)
patternLabelPosHigh = high + (atr(30) * 0.6)
C_EngulfingBearishNumberOfCandles = 2
C_EngulfingBearish = C_UpTrend and C_BlackBody and C_LongBody and C_WhiteBody[1] and C_SmallBody[1] and close <= open[1] and open >= close[1] and ( close < open[1] or open > close[1] )
alertcondition(C_EngulfingBearish, title = "Engulfing", message = "New Engulfing - Bearish pattern detected.")
if C_EngulfingBearish
var ttBearishEngulfing = "Engulfing\nAt the end of a given uptrend, a reversal pattern will most likely appear. During the first day, this candlestick pattern uses a small body. It is then followed by a day where the candle body fully overtakes the body from the day before it and closes in the trend’s opposite direction. Although similar to the outside reversal chart pattern, it is not essential for this pattern to fully overtake the range (high to low), rather only the open and the close."
label.new(bar_index, patternLabelPosHigh, text="BE", style=label.style_label_down, color = color.red, textcolor=color.white, tooltip = ttBearishEngulfing)
bgcolor(highest(C_EngulfingBearish?1:0, C_EngulfingBearishNumberOfCandles)!=0 ? color.red : na, offset=-(C_EngulfingBearishNumberOfCandles-1))
For bullish:
//@version=4
study("Engulfing - Bullish", shorttitle = "Engulfing - Bull", overlay=true)
C_DownTrend = true
C_UpTrend = true
var trendRule1 = "SMA50"
var trendRule2 = "SMA50, SMA200"
var trendRule = input(trendRule1, "Detect Trend Based On", options=[trendRule1, trendRule2, "No detection"])
if trendRule == trendRule1
priceAvg = sma(close, 50)
C_DownTrend := close < priceAvg
C_UpTrend := close > priceAvg
if trendRule == trendRule2
sma200 = sma(close, 200)
sma50 = sma(close, 50)
C_DownTrend := close < sma50 and sma50 < sma200
C_UpTrend := close > sma50 and sma50 > sma200
C_Len = 14 // 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 = max(close, open)
C_BodyLo = min(close, open)
C_Body = C_BodyHi - C_BodyLo
C_BodyAvg = 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 (abs(C_UpShadow - C_DnShadow) / C_DnShadow * 100) < C_ShadowEqualsPercent and (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 - (atr(30) * 0.6)
patternLabelPosHigh = high + (atr(30) * 0.6)
C_EngulfingBullishNumberOfCandles = 2
C_EngulfingBullish = C_DownTrend and C_WhiteBody and C_LongBody and C_BlackBody[1] and C_SmallBody[1] and close >= open[1] and open <= close[1] and ( close > open[1] or open < close[1] )
alertcondition(C_EngulfingBullish, title = "Engulfing", message = "New Engulfing - Bullish pattern detected.")
if C_EngulfingBullish
var ttBullishEngulfing = "Engulfing\nAt the end of a given downward trend, there will most likely be a reversal pattern. To distinguish the first day, this candlestick pattern uses a small body, followed by a day where the candle body fully overtakes the body from the day before, and closes in the trend’s opposite direction. Although similar to the outside reversal chart pattern, it is not essential for this pattern to completely overtake the range (high to low), rather only the open and the close."
label.new(bar_index, patternLabelPosLow, text="BE", style=label.style_label_up, color = color.blue, textcolor=color.white, tooltip = ttBullishEngulfing)
bgcolor(highest(C_EngulfingBullish?1:0, C_EngulfingBullishNumberOfCandles)!=0 ? color.blue : na, offset=-(C_EngulfingBullishNumberOfCandles-1))
*The bullish and bearish indicators shall be combined into one indicator, any object e.g. arrow can be used to indicate the signal, plus integration of alerts. Trend rules not necessary and may be removed for simplicity. Conditions in bold text are the only ones necessary to create arrow object and alert. Thank you.