Early NFL lines often shift a full point or more, like a -3 opener moving to...

https://casinocrowd.com/is-it-dumb-to-bet-a-line-after-it-moves-from-3-to-4-5/

Early NFL lines often shift a full point or more, like a -3 opener moving to -4.5 by kickoff. Jumping in too soon means missing better prices and value. Patience pays; waiting can turn a mediocre +155 into a sharp +135