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Heidi,
Are you using the same number of periods (i.e., 9 or 14) as the default?
Each service "tweaks" their own set of numbers. Wilder suggested 14 in his
book, but he personally suggested 9 to me two years after he wrote it. You
might want to "run" a number of RSI's for a while, until you find the
periods you are most comfortable with.
Steve Karnish
CCT
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> From: Heidi Stubner <stubner@xxxxxxxxxxxxx>
> To: metastock@xxxxxxxxxxxxx
> Subject: Re: Relative Strength Index
> Date: Monday, November 02, 1998 9:10 AM
>
> I'm trying to calculate how Equis comes up with the RSI figures. I've
> tried using the formula in the manual (100-(100/1+U/D)) where U = change
of
> up days/time period and D= change in down days/time period.
>
> I'm coming up with at least a 5 point difference. I've contacted Equis
and
> they indicated that the real formula is in Wilders book: New Concepts in
> Technical Trading Systems. Unfortunately she wasn't able to send me a
copy
> of that formula. My Reuters RSI is also different from the Metastock #
> (and the # I'm coming up with).
>
> Is there someone who has a copy of his book and could either post the
> formula or could fax it to me? I'd appreciate it very much.
>
> One question is how they would adjust for a period where there were no
down
> days during that time frame? Obviously you couldn't divide the # of up
> days by zero.
>
> Any assistance is greatly appreciated.
>
> Heidi
>
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