Looking to backtrack two NBA systems but need help

Hey all, I'm looking to backtrack two NBA systems, one that I have worked on since '07 in terms of different variations, and another my buddy showed me. I would like to go back at least the past couple of years to start and go from there but am not the most intelligent in terms of linking everything up in Excel. 

Depending on the type of system, it can be back-tested here: https://killersports.com/nba.py/query?sid=guest&text=+&=1&submit=query .

I'm just learning how to use the query but so far it's debunked two stat-based systems in this forum.  The Killersports data base goes way back, at least to 1995 in some of my tests.