Buenos dí 
Con backgroundcolor:
		
			
			
			
			
				
					
				
					
				 
						ema50= ExponentialAverage [ 50 ] (close )
ema200= ExponentialAverage [ 200 ] (close )
 
if   ema50  crosses over   ema200  then 
BACKGROUNDCOLOR (0 ,191 ,255 )
endif 
 
return   ema50,  ema200
 
				
			 
		 
 
Con drawsegment para tambien cambiar grosor de las línea 
		
			
			
			
			
				
					
				
					
				 
						ema50= ExponentialAverage [ 50 ] (close )
ema200= ExponentialAverage [ 200 ] (close )
 
if   ema50  crosses over   ema200  then 
DRAWSEGMENT (barindex [ 1 ] ,  ema50[ 1 ] ,  barindex ,  ema50)  coloured ("deepskyblue" )  style (line ,3 )
DRAWSEGMENT (barindex [ 1 ] ,  ema200[ 1 ] ,  barindex ,  ema200)  coloured ("deepskyblue" )  style (line ,3 )
endif 
 
return   ema50,  ema200
 
				
			 
		 
 
Con coloured(…) para cambiar directamente los colores de las ema:
		
			
			
			
			
				
					
				
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						ema50= ExponentialAverage [ 50 ] (close )
ema200= ExponentialAverage [ 200 ] (close )
 
ema50R= 0 
ema50G= 0 
ema50B= 0 
ema200R= 0 
ema200G= 0 
ema200B= 0 
 
if   ema50  crosses over   ema200  then 
ema50G= 191 
ema50B= 255 
ema200G= 191 
ema200B= 255 
endif 
 
return   ema50  coloured (ema50R,ema50G,ema50B),  ema200  coloured (ema200R,ema200G,ema200B)
 
				
			 
		 
 
 
				
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