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MS Support  
#1 Posted : Friday, July 28, 2017 10:27:44 PM(UTC)
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MS Support

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Vitali Apirine's article, “Exponential Standard Deviation Bands”, introduced an indicator of the same name.  The MetaStock formula for that indicator is listed below: 

Exponential Standard Deviation Bands: 

Code:
t1:= Input("time periods", 1, 50, 20);
p1:= C;
ma:= Mov(p1,t1,S);
x:=Sum(Power(p1-LastValue(ma +(PREV*0)),2),t1);
esd:= Sqrt(x/t1);
ma + (esd * 2);
ma;
ma - (esd * 2)

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