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Edson, try this basic SMA bands indicator:
===========
SMA w/bands
===========
---8<---------------------------
{ http://www.metastocktools.com }
{ User inputs }
spread:=Input("SMA bands spread %",0,100,10)/200;
pds:=Input("SMA periods",1,2600,21);
{ SMA }
x:=Mov(C,pds,S);
{ SMA bands }
upper:=x*(1+spread);
lower:=x*(1-spread);
{ Plot on price chart }
upper;x;lower
---8<---------------------------
jose '-)
http://www.metastocktools.com
--- In equismetastock@xxxxxxxxxxxxxxx, "Edson L F" <edsonlf@xxx> 
wrote:
>
> Hi friends!
> 
> how to make a pointer to have the value of the envelope (+ and -)
> of a moving average? 
> 
> Ex: 
> 
> {================================}
> 
> a1:=envelope positive ( Mov(C,21) );
> 
> b1:=envelope negative ( Mov(C,21) );
> 
> a1; b1;
> 
> {================================}
> 
> Any advice would be appreciated.
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