Anyone got the data for Historical Super Bowl line movement?

[blix177]

I want to see how often does the Fav line increase is negative points for the superbowl from opening to closing.

I mean we all know, public prefers Favorites and Over, and the public normally bet at the end near the closing market. So I am assuming there is always free money each year to be had if you hammer the starting line of the Favs, and take the Under line right before the game.

This year Indy started at -3 and been moving up since.

[sdtrader]

I am wondering this also as i am thinking about buying the Colts at matchbook and then the other side before the game. But some historical data would be nice to see if this is a profitable move.