acceleration bands
Here is the formula for acceleration bands 

x:=(H-L) / (H+L) /2; 
UB:=Mov(H*(1+((2*X)*100)*.01),20,E); 
LB:= Mov(L*(1-((2*X)*100)*.01),20,E); 
MB:=Mov(C,20,E); 
UB;MB;LB;