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I'm surprised that "professional" MetaStock programmers are capable of
producing such crappy MS code.
Leaving the PREV() issue aside, the code can be written (and better
understood) this way:
---8<--------------------------------
d:=If(C>Ref(HHV(H,3),-1),LLV(L,3),
If(C<Ref(LLV(L,3),-1),HHV(H,3),PREV));
a:=Cross(C,d);
b:=Cross(d,C);
a+-b
---8<--------------------------------
In English:
If the Close is greater than the highest High for the previous three
days, plot the lowest Low of the past three days (including today),
otherwise do this:
If the Close is less than the lowest Low for the previous three days,
plot the highest High of the past three days (including today),
otherwise plot the previous formula value.
jose '-)
http://users.bigpond.com/prominex/pegasus.htm
--- In Metastockusers@xxxxxxxxxxxxxxx, "Jeff" <jnickoloff6@xxxx>
wrote:
> The Enter Long formula for the "3-Day_range Switch" included
> in "Performance Sytems Plus" plugin is as follows:
>
> d:=If(C>Ref(Max(H,Max(Ref(H,-1),Ref(H,-2))),-1),Min(L,Min(Ref(L,-
> 1),Ref(L,-2))),If(C<Ref(Min(L,Min(Ref(L,-1),Ref(L,-2))),-1),
> Max(H,Max(Ref(H,-1),Ref(H,-2))),PREV));
>
> a:=Cross(C,d);
> b:=Cross(d,C);
>
>
> I thought the formula above was a fancy way of simply generating a
> BUY signal if:
>
> CLOSE of TODAY was GREATER THAN the MAX HIGH of the PRIOR 3 DAYS.
>
> Yet, I have found numerous chart examples of the system generating a
> BUY signal when:
>
> CLOSE is LESS THAN the MAX HIGH of the PRIOR 3 DAYS.
>
> So either I'm wrong on how this system generates BUY signal or MS is
> just so buggy that it calculates incorrectly!
>
> Which is it?
>
> Thank you to anyone who can give me some help with this one
>
> -Jeff
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