there is absolutely no correlation to unders in sept or unders in last 2 week of the season.
oct does show 55/45 to the under for a +4% profit but nothing in sept no matter team's winning %, last two weeks of season, etc.
probably the best long term trend is taking over in oct games with 7 or less total ... 63% overs ... and take under anything 8 or above.... 60% unders