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Hi David,
The "Better Bollinger Band" uses exponential smoothing rather than the simple smoothing that Bollinger originally used.
You can find Bollinger indciators here:
http://trader.online.pl/MSZ/e-0-tytulowa-b.html
Basically the formulas for the bands, less all the bells and whistles are:
Upper Band:
mov( C,20,Simple ) + ( 2 * ( std( C ,20 ) ) )
Middle Band:
mov( C,20,Simple )
Lower Band:
mov( C,20,Simple ) - ( 2 * ( std( C ,20 ) ) )
In order to change the formula to the "Better" version all that is needed is to change the word simple to exponential...or just use E.
You can also change the distance between the upper and lower bands by changing the number 2 to something smaller, like 1.5 . This will give you tighter bands.
By using the "ref" function you would shift the values back in time. Ref(X,-1) would give you the calculated values from yesterday.
Using Ref(X,1) would not yield any results since tomorrow's data is not known.
Hope this helps,
Preston
--- In equismetastock@xxxxxxxxxxxxxxx, "david.travis08" <david.travis08@xxx> wrote:
>
> Hello everyone,
>
> Can someone in this forum tell me how to code these indicators so that it shift faster from horizontal region?
>
> Someone in Equis International has pointed me out to us ref() within the indicator builder for shift in and out function. Now I am quite confuse because this fuction is referencing tomorrow??
>
> Any one please???!!!
>
> a)
>
> Better Bollinger Bands I
>
> pds:=Input("Periods",2,200,20);
> sd:=Input("Standard Deviations",.01,10,2);
> alpha:=2/(pds+1);
> mt:=alpha*C+(1-alpha)*(If(Cum(1)<pds,C,PREV));
> ut:=alpha*mt+(1-alpha)*(If(Cum(1)<pds,C,PREV));
> dt:=((2-alpha)*mt-ut)/(1-alpha);
> mt2:=alpha*Abs(C-dt)+(1-alpha)*PREV;
> ut2:=alpha*mt2+(1-alpha)*PREV;
> dt2:=((2-alpha)*mt2-ut2)/(1-alpha);
> but:=dt+sd*dt2;
> blt:=dt-sd*dt2;
> dt;
> but;
> blt
>
> ----------------------------------------------------------------------------------------------------
>
> b
>
> Better Bollinger Bands II
>
> Lb:=Input("Look-Back Period ?",3,100,20);
> De:=Input("Band Deviation ?",.5,3,2);
> Alp:=2/(Lb+1);
> Mt:=Alp*CLOSE+(1-Alp)*PREV;
> Ut:=Alp*Mt+(1-Alp)*PREV;
> Dt:=((2-Alp)*Mt-Ut)/(1-Alp);
> mt2:=Alp*Abs(C-Dt)+(1-Alp)*PREV;
> ut2:=Alp*mt2+(1-alp)*PREV;
> dt2:=((2-Alp)*mt2-ut2)/(1-Alp);
> But:=Dt+de*dt2;
> Blt:=Dt-de*dt2;
> But;
> Dt;
> Blt;
>
------------------------------------
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