MOM

MTM:CLOSE-REF(CLOSE,12); 
MB:=MA(MTM,20);  
R:=(MTM-MB)*(MTM-MB);  
X1:=MA(R,20);  
X2:=SQRT(X1);  
D1:=1; 
UPPER:MB+(D1*X2),COLORFFFFFF;  
LOWER:MB-(D1*X2),COLORFFFFFF;