Convert Tradingview's (Pinescript) Engulfing Indicators to MQL5 for MetaTrader5 Use

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.