Hi,

Below is the Metastock formula for volume wave. I got from this forum (forgot the name of the coder). This plots a wave histogram below price showing average volume as per percentage move in price I want to make some changes into the code. 

1) is it possible to have points based change (close to close) basis instead of % base?

2) I want to plot the increasing average volume above the bar  and decreasing average volume below the bar (in multiple of 1000 or 10000) instead of having histogram.

this is the code:

N:=Input("ZigZag % Parameter",0,99,10);
A:=Zig(C,N,%);
B:=Ref(A,-1)>A AND Ref(A,1)>A OR
A>Ref(A,-1) AND A>Ref(A,1);
X:=A>ValueWhen(2,1,A); Z:=Cum(1);

{Calculate/plot frame Volume}
D:=BarsSince(Ref(B,-1)+(Z=1))+1;
ExtFml("Forum.Sum",V,D)*X;
ExtFml("Forum.Sum",V,D)*(X=0);

Kindly help.   

Regards,

Ketal