Based on the code you provided about finding bullish and bearish heikin ashi candlesticks, the code of the strategy would be as follows:
		
			
			
			
			
				
					
				
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						xClose  =   (Open + High + Low + Close )/ 4 
if (barindex > 2 )  then 
xOpen  =   (xOpen[ 1 ]   +   xClose[ 1 ] )/ 2 
endif 
green=   xClose> xOpen  AND   xClose[ 1 ] < xOpen[ 1 ] 
red=   xClose< xOpen  AND   xClose[ 1 ] > xOpen[ 1 ] 
 
long  =   green= 1   and   green[ 1 ] = 1   and   green[ 2 ] = 0 
short  =   red= 1   and   red[ 1 ] = 1   and   red[ 2 ] = 0 
 
if   long  then   
  buy   1   share   at   market   
endif   
 
if   short  then   
  sell   1   share   at   market   
endif   
 
				
			 
		 
Here, I do not test a “series of red candles” or a “series of green candles” but only 1, you’ll have to define what you consider as a “series”.