When the betting line moves so do the overall NFL odds which corresponds to how much a bet will pay off. Experienced bettors will track the NFL betting line to find the most opportune time to place a bet. NFL line movement is tracked from where the line started - otherwise known as the “open” - to where the line either currently sits or where it finishes known as the “close”. Line movement occurs when money comes in on one side or another and the betting line or spread is impacted. NFL line movement is one of the most important aspects of betting professional football.