Figured I'd bring this one back now that the database is functional again. The idea is to play the UNDER when you have a team that scored at least 49 points in their previous game and they're playing a conference opponent. This system only applies to games played before November. In database history, the system is 483-348-43 (58.1%). Games in this system where the total was <50 have gone under at an even better 70-33-9 (68.0%) clip. I'll be back to update when conference play is in full swing. You can always follow along with this link.
CFB Under System