Line Shopping: How Much Edge It Adds

Line shopping is the practice of comparing odds across sportsbooks before placing a bet, then betting at the book offering the best price on your side. It is the single highest-ROI habit a recreational bettor can adopt — and most don't.

The math: - Suppose you find a play at -110 on DraftKings and -105 on BetMGM. - -110 implies 52.4%. -105 implies 51.2%. - The 1.2 percentage points of implied-probability you save by taking BetMGM is pure edge added to your bottom line.

Over 1,000 -110 bets at 52.4% break-even: - 52% win rate = -1.6 units. -110 bettor loses. - Same bettor at -105 = +5.7 units. Same bets, different result.

The hold gap across major US books: - Pinnacle, BetOnline, lowvig: 2-3% hold (sharpest). - BetMGM, Caesars, BetRivers: 4-5% hold. - DraftKings, FanDuel: 5-7% hold (heaviest in market).

A -110 line at one book might be +100 at another. The difference is real money. Most retail bettors take whatever DraftKings shows them because it's the only book they have.

Best practice for line shopping: - Have at least 3 sportsbook accounts open. - Use an odds aggregator (or the public JSON these books expose) to compare in real time. - Take the best number on the side you've decided to play. Never let the number decide the play — only the size.

Slick's quant agent on CleverBet runs this exact comparison. Pinnacle (or sharp anchors lowvig and BetOnline) sets the true price. Every soft book is scored against it. The pick we post is at the book offering the best line for your side, every time.

Compounded over a full season of plays, line shopping alone adds 1-3% to ROI without any additional skill. It is free money.