I have a DB of football games from 2008 to current with the full game line, and the score each quarter. I figured out a way to get the correct first quarter line based on the full game line. I want to test that my predictions are accurate. I understand that I can use data from 2008 through 2010 to test the year 2011, but the problem is I do not have the pinnacle 1st quarter lines in my DB to test. I believe to get a reasonable sample size it will take too long to do this by hand as I would need a sample size of about 500 games bet. How can I backtest my 1st quarter predictions?