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Hey Roy, This is what I call Modesty of Scientists. Keep heads up..
Hani
----- Original Message -----
From: "Roy Larsen" <rlarsen@xxxxxxxxxxxxxx>
To: <Metastockusers@xxxxxxxxxxxxxxx>
Sent: Sunday, January 23, 2005 10:25 PM
Subject: Re: [Metastockusers] How to reproduce the zig zag formula
>
> Steve
>
>
> If you want to learn the formula language I suggest to you pick another
exercise. There are
> certainly enough to choose from. I'm not one to give up easily on
challenges, but ZigZag and SAR are
> two that have proved to be beyond me. Then there are others that have,
shall we say, been on the
> back-burner for a long time.
>
> Limitations with the formula language make it very difficult to string an
indeterminate number of
> lines together, particularly when they are not horizontal or equal in
pitch or length. When you can
> string just two lines together, such that one starts where the other
finishes, you'll have a better
> appreciation of the difficulties involved.
>
> For a competent programmer with access to the MetaStock Development Kit
it's probably a breeze, but
> for us mere mortals confined to the MetaStock Formula Language I think
this particular challenge
> should be left sitting out of sight in the "too hard" basket.
>
>
> Kind regards
>
> Roy Larsen
> www.metastocktips.co.nz
>
>
>
>
>
> ----- Original Message -----
> From: "Steve Grala" <stevegrala@xxxxxxxxxxx>
> To: <Metastockusers@xxxxxxxxxxxxxxx>
> Sent: Monday, January 24, 2005 3:30 PM
> Subject: [Metastockusers] How to reproduce the zig zag formula
>
>
>
>
>
>
>
>
>
> To any smart Metastock formula writer:
>
>
>
>
>
> I have asked this question before but never got an answer. I would
like to know how to reproduce
> the zigzag formula. The zigzag formula is used and talked about here but
I do believe no one here
> knows how to reproduce it with the basic metastock formulas. Obviosly one
can not use the peak or
> troughs function since this is derived from the zig zag itself. I wanted
to write the equivalent
> formula using the basic MetaStock formulas. In order to reproduce the
zigzag you need to draw a
> linear line from point A to point B. I created a simple formula to do
this. First I needed to know
> the slope of point A to point B. In my sample formula point A is the
first day of data loaded and
> point B is the last day of data loaded. Slope = rise over run. Rise is
the difference between
> point A and point B. The run is the number of days over the data. Once
you have the slope you just
> add this each day to the previous day of the data. The result is a nice
linear line going from
> point A to point B. The problem I need to figure out is how to get point
A and point B to change
> according to a certain percentage like in the zig zag formula.
>
>
>
> Sample formula for drawing a linear line from first to last day of data.
>
>
>
> slope:=(LastValue(C)-ValueWhen(1,Cum(1)=1,C))/LastValue(Cum(1));
>
>
>
> line:=ValueWhen(1,Cum(1)=1,C)+Cum(slope);
>
>
>
> line;
>
>
>
> You might ask why write a formula to do what the basic zig(data array, min
change,diff method) all
> ready does. I guess it is just curiosity. I figure it could help in
writing other formulas.
>
>
>
> Thanks
>
>
>
> Steve
>
>
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
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