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Relative Strength Index (RSI) Custom V

Re: Different RSI in MetaStock ?

* To: <metastock@xxxxxxxxxxxxx>
* Subject: Re: Different RSI in MetaStock ?
* From: "Corey Saxe" <csaxe@xxxxxxx>
* Date: Thu, 20 Dec 2001 14:55:40 -0800
* References: <1915b14942.149421915b@xxxxxxxxx>
* Sender: owner-metastock@xxxxxxxxxxxxx

----- Original Message -----
From: "onno goedknegt" <o.goedknegt@xxxxxxxxx>
To: <pdmanager@xxxxxxxxxxxxxxxxx>
Cc: <metastock@xxxxxxxxxxxxx>
Sent: Thursday, December 20, 2001 11:42 AM
Subject: Different RSI in MetaStock ?

> Dear Sirs,
>
> It looks like other MetaStock users noticed the following fact:
>
> It seems that the calculation for RSI in MetaStock differs from the standard RSI calculation.
>
> I'm trying to "translate" my MetaStock trading system into an Excel sheet.
> And because my MetaStock trading system contains RSI, I need to "translate" the RSI calculation into Excel.
>
> Attached Excel sheet contains my RSI calculation (sheet: calc 1).
> Other calculations downloaded from the Internet give the same values for RSI as my calculation (sheet: calc 2).
>
> MetaStock RSI values are shown in red.
>
> 1. Which version is correct ?
> 2. How does MetaStock calculate their RSI ?
> 3. Can you give the exact formula how MetaStock's RSI is calculated?
>
> Kind regards,
> Onno

I believe that Roy was all over this one a few days ago when he wrote:

Relative Strength Index (RSI) Custom V

A:=Input("RSI periods",2,50,14);
B:=C; {RSI target array}
U:=Wilders(If(B>Ref(B,-1),B-Ref(B,-1),0),A);
D:=Wilders(If(B<Ref(B,-1),Ref(B,-1)-B,0),A);
100-(100/(1+(U/D)));

I don't know about you, but it is an exact match with the hard-wired RSI from MS on my machine.

-Corey.

Source / From: TOP
http://purebytes.com/archives/metastock/

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