Different RSI in MetaStock ?

["onno goedknegt" <o.goedknegt@xxxxxxxxx>]

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

Attachment: xls00002.xls
Description: "RSIexcel.xls"