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Greg,
First, a suggestion, NEVER NAME A CUSTOM INDICATOR THE SAME AS A
PACKAGED INDICATOR. It will save you from countless headaches later
on. Change the name to TRIXX. That way it will be easy to identify
the custom versus the packaged indicator.
Second, you have not mentioned which version of Metastock you have.
In version 8 and 7.2 the call for Trix includes the data array...TRIX
(Data Array, Periods). In earlier versions the call is TRIX(Periods).
The default data array is the close.
Finally, in the exploration you will need to decide whether you want
to use the packaged indicator or the custom indicator which you have
written. In the indicator which you have written the default value is
13, thus this would be used when the formula is called in an
exploration or system test.
The smartest way that I know of to keep up with different lookback
periods is to identify the periods used in the title. Use TRIXX13 for
a custom written formula with a 13 period lookback. Use TRIXX20 for a
custom formula with 20 periods. Like this:
TRIXX13:
d:=13;
MA:= Mov(C,d,E);
MA1:= Mov(MA,d,E);
MA2:= Mov(MA1,d,E);
ROC(MA2,1,%)
TRIXX20:
d:=20;
MA:= Mov(C,d,E);
MA1:= Mov(MA,d,E);
MA2:= Mov(MA1,d,E);
ROC(MA2,1,%)
Hope this helps!
Preston
--- In equismetastock@xxxxxxxxxxxxxxx, "Greg" <tardy.g@xxxx> wrote:
> Hi everyone,
>
> I am using the TRIX indicator from S&C of a few month ago.
>
> TRIX:
>
> d:= Input("Number of Periods",5,100,13);
> MA:= Mov(C,d,E);
> MA1:= Mov(MA,d,E);
> MA2:= Mov(MA1,d,E);
> ROC(MA2,1,%)
>
> I named the indicator TRIX.
>
> If I plot it on a chart, I get the choice of the period in the
dialog box
> appearing when I drag an drop.
>
> If I use it in the explorer I get the default period, 13,
automatically.
>
> Is there a way to run an exploration for a 20 day period using the
existing
> indicator ? I tried TRIX(20) without success.
> The idea is to define a basic formula with variables that can be
used as
> parameters (properties) both in the exploration and in other
indicators. For
> example, I could be interestd in plotting a 9 day EMA of a TRIX
(35). This
> would be Mov(TRIX(35),9,E) without having to create a TRIX(35)
indicator.
>
> To conclude, using Mov(9)TRIX(20) or Mov(14)TRIX(21) with two
generic
> formula Mov() and TRIX() would be great.
>
> An thoughts ? Solutions ?
>
> Thanks,
>
> Greg.
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