Early NFL lines often shift a full point or more—think opener at -3 dropping to...

https://www.joint-bookmarks.win/jumping-on-early-nfl-lines-like-a-team-at-3-shifting-to-4-5-can-feel-smart

Early NFL lines often shift a full point or more—think opener at -3 dropping to -4.5 by kickoff. Jumping in too soon means you’re paying inflated prices or missing sharper moves