I figure within 12 games a top team plays, 4-6 of them are basically useless indicators of anything. Let's say 6, and then the other 6 include 3 teams that could have a fighting chance on a given day, and 3 that are pretty decent teams. I'm talking about spreads in the first 6 being 25+, the second 3 is around 14, and then the last three are about 7-10. I'd throw out any data from the first 6 bad teams and focus on the 6 teams with a heartbeat.