Market Guide Beta Formula

["Ed Middleton" <emiddleton@xxxxxxxx>]

Anyone have the formula for the Market Guide Beta?  Market Guides'
definition is as follows:

"The Market Guide Beta is the slope of the 60 month regression line of the
percentage price change of the stock relative to the percentage price change
of the S&P500.  Beta values are not calculated if less than 24 months of
pricing is available."

Can anyone give me some idea on how to program this in Metastock?  I am not
much of a programmer but can get around.   Even the supplied Metastock Beta
is different.

Market Guide value = 0.51
Metastock Beta = 1.769

Please Help!!!!!

thanks in advance,

Ed Middleton