If you work in American odds, convert first:

• a positive line is 1 + line ÷ 100 (+150 = 2.50)
• a negative line is 1 + 100 ÷ line (−120 = 1.83)

Example: the sportsbook offers +150 (2.50) and the fair price is 2.38. (2.50 ÷ 2.38 − 1) × 100 ≈ 5, so you expect about +5% on that stake over the long run. Higher EV usually comes with longer odds and more variance.

Read more: What is a ValueBet, how is the rating calculated, and how do the ValueBet tools work?