Why lines move

A line is a price, and prices move for reasons. The reason matters more than the move.

The common reasons:

• Information. An injury, a lineup change, weather. The price adjusts to new facts.
• Money. A book takes more than it wants on one side and moves the price to slow it down.
• Respected money. Large bets from bettors a book takes seriously can move a price by themselves.
• Copying. Books watch each other. One moves and others follow.

Example only: a spread opens at -3 and is -4 by the weekend. If the other team's quarterback was ruled out on Wednesday, that is information, and it is already in the price. If nothing changed in the news, the move came from money.

Where it shows up in our plays: we sort each move before anything else. A move explained by public news that is already priced in is a pass. We use Circa as our reference for whether a move is real, and we check the news at the time of the play.

What cuts against it: nobody outside a sportsbook sees who bet what. Reading a move is a working view, not a fact, and one book moving alone is often noise.

Takeaway: ask why it moved before you ask which way.

Education only, not a guarantee. 1-800-GAMBLER.