Calculating stock beta values using Esignal

I want an application that downloads data for a list of stocks (needs to be changed from time to time) from Esignal for example 3000 2 minute bars. Beta value shoudl be calculated using the 900 last values of the stock and SP500 index (SPX). Values should be put in a text file in alphabetical order. More information on esignal on [login to view URL];groupid=185