Use free real-time odds comparison sites to line shop across books. Check the...

https://wiki-tonic.win/index.php/What_Is_an_Opener_Line,_and_Why_Should_I_Care%3F

Use free real-time odds comparison sites to line shop across books. Check the same market, such as a team spread or game total, so prices are fair to compare. Before you place a bet, verify the pick, odds, and stake on your bet slip first.