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> What is the return value from "Cum(IsDefined(condition))=1;"
This is the initialization bar, or the first occurrence of a valid or
"defined" Data Array. The Init signal is very useful for removing any
subsequent null periods introduced by BarsSince(), ValueWhen() and
other MetaStock functions.
jose '-)
http://www.metastocktools.com
--- In equismetastock@xxxxxxxxxxxxxxx, "v" <entinv@xxxx> wrote:
> Jose,
>
> Using code for the null bar removal that you've posted sometimes
> back I've fixed the problem.
> Thank you very much.
>
> The code works but I don't fully understand it. Here it is:
>
> ================
> Null bar removal
> ================
> ---8<--------------------
> { Removes Null periods from condition,
> but not from indicator }
>
> condition:=Cross(RSI(14),25);
> ISNA:=IsUndefined(BarsSince(condition));
> Init:=Cum(IsDefined(condition))=1;
>
> If(ISNA,0,BarsSince(condition OR Init))
>
> ---8<--------------------
>
> What is the return value from "Cum(IsDefined(condition))=1;"
> if condition defined? , if undefined?
>
>
> Vladimir
> -----Original Message-----
> From: equismetastock@xxxxxxxxxxxxxxx
> [mailto:equismetastock@xxxxxxxxxxxxxxx]On Behalf Of Jose Silva
> Sent: Tuesday, April 26, 2005 9:22 AM
> To: equismetastock@xxxxxxxxxxxxxxx
> Subject: [EquisMetaStock Group] Re: Gil Raff exploration
>
> Vladia, unfortunately once a null (N/A) period is introduced in
> MetaStock code, no amount of If() statements will make it go away.
>
> Try removing as much of the null period as you can from the source
> of your code. The BarsSince() is the culprit there.
>
>
> jose '-)
> http://www.metastocktools.com
>
>
>
> --- In equismetastock@xxxxxxxxxxxxxxx, "v" <entinv@xxxx> wrote:
>
> Last line of this exploration produces N/A rejection in those
> securities where "condition1" is undefined. That is what I've
> expected to avoid by using "IsUndefined".
>
> I'd appreciate if anybody can point out a problem.
>
>
> {ColB}
> condition:=Cross(0.955*Ref(C,-2),C);
> ISNA:=IsUndefined(condition);
> condition1:=Ref(Cross(0.955*Ref(C,-2),C),-1);
> ISNA1:=IsUndefined(condition1);
>
> If(ISNA,10000,BarsSince(condition AND
> BarsSince(((MACD()>Mov(MACD(),9,E) AND
> C>Mov(C,5,E) AND
> C>Mov(C,15,E))=TRUE) AND
> (Ref(MACD()>Mov(MACD(),9,E) AND
> C>Mov(C,5,E)AND
> C>Mov(C,15,E),-1)=FALSE))
> <=If(ISNA1,10000,BarsSince(condition1))))
>
>
> Thanks,
> Vladimir
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