line movements are worth paying attention to. they can help get the best possible price on your wagers and it can also give you valuable information on how to bet, but use only as a guide. you still have to do your homework on your game before betting
I always look at line movements, especially reverse line movements
if I can't find a legit reason for that type of move, I feel some "sharps" know something.
It doesn't always work out, but I've won a lot more games this way.