Likely Dennis Tyler and/or Norm for sure are already on this...and probably like others I mostly have success using trends. This trend has solid ROI period but has been more lucrative basically every season for the last 5....peaking last year going under 75% of the possible matches. I tinkered with leagues and totals and line and timeframe:
BEFORE July (can be expanded to whole seasons) when both teams scored 2 or less runs each the game before and it is within the same series and the home team is favored the Under in this game is quite lucrative and was 36 of 48 last year!
https://goo.gl/rfZeEt
Will try to keep this going...active today with Toronto and San Diego