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Neo
Ref(X,-1) allows you to look at yesterdays (previous bar) value of an ALREADY DEFINED variable (X).
Prev allows you to look at yesterdays value of the variable you are CURRENTLY CREATING, and use that
value to determine or modify the value or status of the current day/bar. Hence the term "self
referencing".
Roy
----- Original Message -----
From: "neo" <neo1@xxxxxxxxx>
To: <metastock@xxxxxxxxxxxxx>
Sent: Thursday, 12 July 2001 01:20
Subject: PREV function
> I have been using MS Pro for over 1 1/2 years and I do not
> understand the PREV function. It is not well explained in either
> the manual or the help file. How does it differ from Ref(X,-1)?
>
> I am trying to have a formula determine if I am long or short.
>
> Any help?
>
> neo
>
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