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John, I'm no expert on the inner workings of MetaStock's PREV function,
so the following is just a guess.
Whilst it's true that the two PREV's cancel each other, the LastValue
(variable+PREV-PREV) trick probably works because most likely
MetaStock processes the first series of +PREV loops, before dealing
with the -PREV lot. Spaces between MS functions probably have no
impact other than taking valuable formula space; commas will produce
errors.
jose '-)
http://metastocktools.com
--- In equismetastock@xxxxxxxxxxxxxxx, "John Doe"
<ms001122@xxxx> wrote:
> Jose,
>
> Thanks for the quick and, as usual, accurate reply! Two questions
> though: it seems counterintuitive to use +PREV and -PREV together;
> don't these values just cancel each other out? And should they always
> be used without a space or comma inbetween i.e. as +PREV-PREV
> and not +PREV -PREV or +PREV, -PREV?
>
> JD
> Each day I learn something new
> =====================================
>
> From: "Jose Silva" <josesilva22@xxxx>
> Reply-To: equismetastock@xxxxxxxxxxxxxxx
> To: equismetastock@xxxxxxxxxxxxxxx
> Subject: [EquisMetaStock Group] Re: Displace indicator backward
> Date: Wed, 17 Aug 2005 06:43:34 -0000
>
> Try this MS trick to extend forward-referencing to the edge of your
> chart:
>
> LastValue(Ref(Fml("My indicator"),5)+PREV-PREV)
>
>
> jose '-)
> http://metastocktools.com/#metastock
>
>
> --- In equismetastock@xxxxxxxxxxxxxxx, "John Doe"
> <ms001122@xxxx> wrote:
> Hi,
>
> I created a 5 day pivot high indicator, hereafter called "My indicator".
> It identifies a pivot high that is also a 5-day high. Also, and this is
> important, the pivot is not marked (identified) till 5 days have passed
> since its occurrence.
>
> But when I plot "My indicator" on a chart, the line starts 5 days after
> each pivot high (since the pivot is identified only 5 days later) and
> continues till the right edge of the chart. In order to make the line
> coincide with the bar where the pivot high is located, I used
> Ref(My Indicator, +5) but then the line stops 5 bars short of the right
> edge of the chart!
>
> I want to plot the line so that it coincides with the pivot high (even
> though the pivot is identified 5 days later), yet continues to the right
> edge of the chart. I suspect the Cum(1) argument is needed but I
> couldn't code it with success. Can somebody please help? Thanks.
>
> JD
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