Wolf-
I understand what you mean on that avenue. I'm just looking at it and wondering at what point do you think it will 'top' out either way.
For foots I routinely use 4 outs for in play betting including Matchbook. My approach is not to look at the price as to when it will top out but to get a good feel for the game and anticipate what might happen. Bets early in the game are easier to hedge than later bets if the game swings (i.e. back and forth and not a blowout).
For example in the New England game I had no straight bets before the game. I played Pats-7.5 after the first score by Jacksonville. When the Pats scored a TD in the 3rd to go ahead by 7 one book made the mistake of offering Jacksonville+13.5/-115 (while others were offering +10.5) which I took and also got Pats-13.5/+198 at Matchbook to basically have my original Pats-7.5 balanced by Jacksonville+13.5.
I didn't unload on the huge scalp at -13.5/+13.5 since it's always possible for these offers to quickly disappear so I just slightly overbet the +13.5 and then balanced my action. I made only these 3 bets in play winning both sides on the 11 point win.
As to my feel for the game I had a 6 point middle and expected the Pats to win by 7 or 10 points from the way the game was unfolding. As it turned out I got lucky.