The difference between the odds you backed and the odds at match kick-off — the best long-term predictor of whether your betting strategy has a genuine edge.
Closing Line Value (CLV) measures whether you consistently get better odds than the market's final price before kick-off. If you back a team at 2.40 and the closing line is 2.10, you got positive CLV — you got better than the efficient market price.
The closing line is considered the most efficient estimate of the true probability of an outcome, because it incorporates all available information including sharp money, team news, and public betting action. Consistently beating the closing line is a strong indicator of a genuine long-term edge.
A bettor who consistently achieves positive CLV will be profitable long-term, even during short-term losing runs. A bettor who achieves negative CLV will eventually lose money, even if they are currently winning — they are getting worse odds than they should.
Tracking CLV for every bet you place, alongside actual results, gives you a much clearer picture of whether your betting approach is genuinely skilled or just variance-driven.
Value Betting
Betting at odds that are higher than the true probability of the outcome — finding bets where the bookmaker has underestimated the chances of an event.
Expected Value (EV)
The average outcome of a bet over a large number of repetitions — positive EV means the bet profits long-term; negative EV means it loses.
Implied Probability
The probability of an outcome embedded in bookmaker odds — calculated by dividing 1 by the decimal odds.
Sharp Money
Bets placed by professional bettors ('sharps') whose action bookmakers respect and respond to with line movement.
For informational and educational purposes only. Disclaimer
