Re[2]: [EquisMetaStock Group] Re: StochRSI

[Code 2 <Code2@xxxxxxx>]

Isn't Forum20.dll (August 2006) a more recent version?



From: Roy Larsen <rlarsen@xxxxxxxxxx>
To: equismetastock@xxxxxxxxxxxxxxx
Date: Tuesday, January 27, 2009, 3:28:52 PM
Subject: [EquisMetaStock Group] Re: StochRSI

Hi Rick
 
I notice that you are not using the current version of the Forum DLL.
My testing shoes that the older version's RSI function returns a
different result to the newer version's RSI function if your "vp"
variable is used to set the Variable Period parameter.
 
There also appears to be a divide-by-zero error generated by your
formula on some charts.  Here's how I would lay out your formula to to
make it easier (for me) to follow and fix.  I have no idea where your
floating point overflow error is coming from as I haven't been able to
reproduce that error.
 
 {ZZ StockRSI}
vp:=Fml("ZZ Trend Cycle");
vr:=ExtFml("forumdll.VarRSI",C,vp);
vl:=ExtFml("forumdll.VarLLV",vr,vp);
vh:=ExtFml("forumdll.VarHHV",vr,vp);
ds:=Sum(vh-vl,3); {divisor sum}
20; 80; 100*Sum(vr-vl,3)/(ds+(ds=0));
 
Here's essentially the same formula but using the most recent version
of the Forum DLL.  Both formulas convert a zero divisor to 1.  Placing
fixed-value line outputs prior to the calculated output makes it
possible to call the formula for an exploration and pick up the
calculated value (the last output) instead of a constant.
 
 {ZZ StockRSI}
vp:=Fml("ZZ Trend Cycle");
vr:=ExtFml("forum.RSI",C,vp);
vl:=ExtFml("forum.LLV",vr,vp);
vh:=ExtFml("forum.HHV",vr,vp);
ds:=Sum(vh-vl,3); {divisor sum}
20; 80; 100*Sum(vr-vl,3)/(ds+(ds=0));

Regards
 
Roy
-- 



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