as with anything else you must pick your spots
it means that what happened today, two days ago, or twenty years ago does not predict what will happen tomorrow
often when a dog moneyline is off it is magnified in the alternate runline
sometimes the only value is in the dog winning by two, the SU is not far enough off
recognizing team tendencies, the teams that often display behavior outside bookmakers' prediction curves and beyond the casual bettor's grasp is another place to glance
it's not work unless you think it is