MQL5 Wizard - Trading signals based on Bullish Pregnancy / Bearish Pregnancy + CCI - MetaTrader 5 Expert











There is the book "Strategies of the Best Traders " (in Russian), where many trading strategies are considered, we will focus on reversal candlestick patterns, represented by Stochastic , CCI , Micro Institutions and RSI oscillators.
The best way is to create a separate class derived from Expert Signal for checking the formation of candlestick patterns. For the confirmation of trading signals generated by candlestick patterns, it is enough to write a class derived from CCandlePattern and add in it the necessary functionality (for example, confirmation by oscillator).
Here we will consider signals based on the Bullish Pregnancy/Bearish Pregnancy reversal candlestick pattern and confirm the CCI indicator in the following way. The trading signals module is based on the CC candle pattern class, which is a simple example of creating trading signals using candlestick patterns.
1. “Bull Pregnant” and “Bear Pregnant” Reversal Candlestick Patterns
1.1. Bullish breeding
A bullish breeding reversal pattern forms in a downtrend when a large candlestick is followed by a smaller candlestick with its body within the vertical range of the larger candlestick. This pattern indicates that the downtrend (downtrend) may be reversing, suggesting that now is a good time to enter a long position. The second candle opens with a gap. The smaller the second (white) candlestick, the more likely a reversal is.

Figure 1. “Bull Breeding” Candlestick Pattern
The recognition of the "Bullish Harami" pattern is implemented in the CheckPatternBullishHarami() method of the CC candle pattern class:
//+------------------------------------------------------------------+ //|Check the formation of the "Bullish Pregnancy" candlestick pattern | //+------------------------------------------------------------------+ Boolean valueCCandlePattern ::CheckPatternBullishHarami() { //--- Bullish pregnancy if ((Close( 1 )>Open( 1 )) && //The last completed bar was bullish (white day) ((Open( 2 )-Close( 2 ))>Average body( 1 )) && //The previous candle was bearish and its real body was larger than the average (long black line) ((Close( 1 )<Open( 2 ))) && // The closing price of the bullish candle is lower than the opening price of the bearish candle (Open( 1 )>Close( 2 ))) && // The opening price of the Bullish candle is higher than the closing price of the Bearish candle (Midpoint( 2 )<Closing Average( 2 ))) //Downtrend Return ( True ); //--- Return ( False ); }
CheckCandlestickPattern(CANDLE_PATTERN_BULLISH_HRAMI) method CC Candlestick Pattern class is used to check the formation of the "Bullish Pregnancy" candlestick pattern.
1.2. Bearish on pregnant women
A Bearish Breeding Reversal pattern forms in an uptrend when a large candlestick is followed by a smaller candlestick with its body within the vertical range of the larger candlestick. This pattern indicates that the uptrend (uptrend) may be reversing, which indicates that now is a good time to enter a short position. The second candlestick opens with a gap.
The smaller the second (black) candlestick, the more likely a reversal is.

Figure 2. “Bearish Breeding” Candlestick Pattern
The recognition of the "Bearish Harami" pattern is implemented in the CheckPatternBearishHarami() method of the CC candle pattern class:
//+------------------------------------------------------------------+ //|Check the formation of the "Bearish Pregnancy" candlestick pattern | //+------------------------------------------------------------------+ BooleanCCandlePattern ::CheckPatternBearishHarami() { //--- Bearish pregnant if ((Close( 1 )<Open( 1 )) && //The last completed bar was bearish (black day) ((Close( 2 )-Open( 2 )))>Average body( 1 )) && //The previous candle was bullish and its body was larger than the average (long white line) ((Close( 1 )>Open( 2 ))) && // The closing price of the bearish candle is higher than the opening price of the bullish candle (Open( 1 )<Close( 2 ))) && // The opening price of the Bearish candle is lower than the closing price of the Bullish candle (Midpoint( 2 )>Close Average( 2 ))) //Uptrend Return ( True ); //--- Return ( False ); }
CheckCandlestickPattern(CANDLE_PATTERN_BEARISH_HRAMI) Method CC Candlestick Pattern class is used to check the formation of "Bearish Breeding" candlestick pattern.
2. Trading signals confirmed by CCI indicator
The closing of an open position depends on the value of CCI. This can be done in two situations:

Figure 3. The “bullish gestation” pattern confirmed by the CCI indicator
2.1. Open long position/close short position
The formation of the "bullish gestation" pattern must pass the CCI indicator: CCI(1)<-50 (the CCI value of the final completed bar must be less than -50).
Short positions must be closed if: The CCI indicator has crossed the key level -80 upwards or crossed the key level 80 downwards.
//+------------------------------------------------------------------+ //|Check the conditions for entering and exiting the market | //| 1) Enter the market (open long position, result = 80) | //| 2) Market Exit (Close Position, Result=40) | //+------------------------------------------------------------------+ Integer CBH_BH_CCI::long condition() { Integer result = 0 ; //--- idx can be used to determine the Expert Advisor working mode //--- idx=0 - in this case the EA checks the trading conditions on every price move //--- idx=1 - in this case the EA only checks the trading status of the news bar integer idx =StartIndex(); //--- checks the conditions for opening a long position //--- Bullish gestation pattern is formed and CCI<-50 if (check candlestick pattern (CANDLE_PATTERN_BULLISH_HARAMI) && (CCI( 1 )<- 50 )) Result = 80 ; //--- check closing conditions //--- Signal lines for overbought/oversold levels are crossed (down -80, down -80) if (((CCI( 1 )>- 80 ) && (CCI( 2 )<- 80 )) || ((CCI( 1 )< 80 ) && (CCI( 2 )> 80 ))) result = 40 ; //--- return result return (result); }
2.2. Open short position/close long position
The "Bearish Pregnancy" pattern must be formed through the CCI indicator: CCI(1)>50 (the CCI indicator value of the last completed bar must be greater than 50).
Long positions must be closed if the CCI indicator has crossed below the -80 or 80 levels.
//+------------------------------------------------------------------+ //|Check the conditions for entering and exiting the market | //| 1) Enter the market (short position, result = 80) | //| 2) Market Exit (Close Position, Result=40) | //+------------------------------------------------------------------+ Integer CBH_BH_CCI::ShortCondition() { Integer result = 0 ; //--- idx can be used to determine the Expert Advisor working mode //--- idx=0 - in this case the EA checks the trading conditions on every price move //--- idx=1 - in this case the EA only checks the trading status of the news bar integer idx =StartIndex(); //--- checks the conditions for opening a short position //--- Bearish gestation pattern is formed and CCI>50 if (check candlestick pattern (CANDLE_PATTERN_BEARISH_HRAMI) && (CCI( 1 )> 50 )) Result = 80 ; //--- check closing conditions //--- Signal lines for overbought/oversold levels are crossed (-80 down, 80 down) if (((CCI( 1 )< 80 ) && (CCI( 2 )> 80 )) || ((CCI( 1 )<- 80 ) && (CCI( 2 )>- 80 ))) result = 40 ; //--- return result return (result); }
2.3. Use the MQL5 Wizard to create an Expert Advisor
The CBH_BH_CCI class is not included in the standard library classes, to use it you need to download the acbh_bh_cci.mqh file (see attachment) and save it to client_terminal_data\folder\MQL5\Include\Expert\Signal\MySignals. The same operation should be performed for the candlepatterns.mqh file. After restarting MetaEditor, you can use it in the MQL5 Wizard.
Create Expert Advisor Launch MQL5 Wizard :

Figure 4. Creating an Expert Advisor using the MQL5 Wizard
Let's specify the name of the Expert Advisor:

Figure 5. General properties of EA trading
After that we need to choose the trading signal module to use.

Figure 6. Signal properties of EA trading
In our case we use only one trading signals module.

Figure 7. Signal properties of EA trading
Added trading signals module:

Figure 8. Signal properties of EA trading
You can choose any trailing attribute, but we will use "Unused Trailing Stop":

Figure 9. Tracking properties of Expert Advisor
Regarding the money management properties, we will use "Fixed Volume Trading":

Figure 10. Money management attributes of EA trading
Press the "Finish" button and we will get the code of the generated Expert Advisor located in Expert_ABH_BH_CCI.mq5, which will be saved in terminal_data_folder\MQL5\Experts\.
Default input parameters of the generated Expert Advisor:
//--- Main signal input Input integer Signal_ThresholdOpen = 10 ; //Open signal threshold[0...100] Input integer Signal_ThresholdClose = 10 ; // Close signal threshold [0...100] Enter double Signal_PriceLevel = 0.0 ; // price level at which to execute the trade Enter double Signal_StopLevel = 50.0 ; // Stop loss level in pips Enter double Signal_TakeLevel = 50.0 ; // Take profit level (in pips)
Must be replaced with:
//--- Main signal input Input integer Signal_ThresholdOpen = 40 ; //Open signal threshold[0...100] Input integer Signal_ThresholdClose = 20 ; // Close signal threshold [0...100] Enter double Signal_PriceLevel = 0.0 ; // price level at which to execute the trade Enter double Signal_StopLevel = 0.0 ; // Stop loss level in points Enter double Signal_TakeLevel = 0.0 ; // Take profit level (in pips)
Signal_ThresholdOpen/Signal_ThresholdClose input parameters allow specifying threshold levels for opening and closing positions.
In the code of the LongCondition() and ShortCondition() methods of the trading signal class, we specify the fixed value of the threshold:
The Expert Advisor generates opening and closing positions by the MQL5 Wizard using "votes" in the Trading Signals module. The vote of the main module (which acts as a container and consists of all added modules) is also used, but its LongCondition() and ShortCondition() methods always return 0.
The voting results from the main module are also used for "voting" averaging. In our case we have: main module + 1 trading signals module, so we need to take this fact into account when setting the thresholds. Therefore, ThresholdOpen and ThresholdClose must be set to 40=(0+80)/2 and 20=(0+40)/2.
The value of the Signal_StopLevel and Signal_TakeLevel input parameters is set to 0, which means that the position will be closed only when the closing conditions are met.
2.4. Historical backtest results
Let us consider Expert Advisor's backtest on historical data (EURUSD H1, test period: 2010.01.01-2011.03.16, PeriodCCI=11, MA_period=5).
When creating the EA, we used a fixed trading volume ( fixed lot size for trading , 0.1) and did not use the trailing stop algorithm ( trailing was not used ).

Figure 11. EA trading test results based on Bullish Pregnancy/Bearish Pregnancy + CCI
The best set of input parameters for the Strategy Tester MetaTrader 5 client can be found using the following command.
The code for the Expert Advisor created by the MQL5 Wizard is attached in Expert_abh_bh_cci.mq5.
Attachment download
📎 acandlepatterns.mqh (20.34 KB)
📎 acbh_bh_cci.mqh (7.98 KB)
📎 expert_abh_bh_cci.mq5 (6.63 KB)
Source: MQL5 #311
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