The hardest thing about line movement is determining what is driving the move. Obviously, one wants to play with the sharps and / or against the squares.
I like to look for certain patterns of moves. I also evaluate the game. The more obscure the game, the more comfortable I feel with it being a smart move. There are lots of other things to watch as well.
Playing line moves in college hoops will hit about 55 percent for a season. If one is a good capper, this would be a good starting point from which to make capped selections.
It's really more art than science and I certainly do not claim to be an expert. I know this is a controversial area of sports betting so I usually do not post my opinions on it because invariably someone takes offense.