I have watched this market fer years but never playing because of the time and effort required, but when the lower ranked teams go a goal up on their bigger rivals then an anomoly is created in the market with layers and players looking to trade out on wins and losses.
Take Liverpool last night 0-1 down at half time, I'm guessing the half time betting was about Evens, 9/4, 11/4. My betting would have been 1/2, 5/2, 6/1. The thinking being that the bigger teams only put in half an effort at the start but when they go a goal down then they get the 'slap in the puss' wake-up call and start to play properly.
Just a theory of mine !