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Mike
> 2 questions here...
> 1/
> Trying to find a way to have a test condition check for a match on all
data
> periods in the array, rather than just 'one' which passes within the
defined
> period.
>
> ie; the 'Alert' function for instance passes if 'any' of the periods
defined
> match the test conditions. Is there a way to define a test condition
whereby
> ALL of the defined periods have to pass?
> A condition must be true over all of 5 periods.. instead of being held
true
> even if it's true on only one of the periods. A manual way of doing this
is
> using the REF function, but it's very laborious if testing anymore than
just
> a few periods as it has to be tested for each of the historical periods
> referenced.
Sum(C>=Ref(C,-1),5)=5;
is logically the same as..
C>=Ref(C,-1) AND Ref(C,-1)>=Ref(C,-2) AND Ref(C,-2)>=Ref(C,-3) AND
Ref(C,-3)>=Ref(C,-4) AND Ref(C,-4)>=Ref(C,-5);
This example is courtesy of Jose Silva
The expression inside the Sum() gives a binaray TRUE result, i.e. ONE.
Summing this over five periods when the expression was true gives a result
of FIVE, that is, true on each of the last five bars.
> 2/
> 'When' function.
> This is not defined in the list of functions, and not referenced in the
help
> files. However, I have a formula that uses it, but the function itself is
> not defined specifically yet Metastock accepts and uses it?? ..are there
any
> more like this?.. and any help / explanation files around for it (would
like
> to be able to see what it's doing).
C>=Ref(C,-1);
is logically the same as..
When(C>=Ref(C,-1));
and so is..
C>=Ref(C,-1)=TRUE;
Roy
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