Free real-time odds sites help you line shop as prices move. Compare the same...

https://elliotsinspiringblog.scriblorax.com/posts/how-do-i-track-bets-so-i-stop-forgetting-the-losers

Free real-time odds sites help you line shop as prices move. Compare the same market at each book, not just the game. Check your bet slip for the right line, odds, stake, and pick before you confirm, since prices may change. Review it again before placing