Closing line value (CLV) is the difference between the odds you received on a bet and the odds at game time — after all pre-game information has been priced in. Positive CLV means you got a better price than the final market. Negative CLV means the market moved against you.
The Basic CLV Calculation
For point spreads:
- You bet Chiefs -3 (your price)
- The Chiefs close at -5 (the final pre-game line)
- CLV = +2 points — you beat the closing line by 2 points
For moneylines:
- You bet Team A at +130
- They close at +110
- CLV = +20 cents — you got better odds than the market's final assessment
Why CLV Predicts Long-Term Results
The closing line is the market's most efficient estimate of true probability — it reflects all pre-game information including sharp betting action. If you consistently get better prices than the close:
- You're identifying value before the market corrects
- You have genuine edge that should translate to profit over a large sample
Research by professional bettors and academics shows that CLV is one of the strongest predictors of long-term sports betting success — stronger than win rate alone.
No-Vig CLV
The most accurate CLV calculation uses no-vig prices — removing the book's margin from both your price and the closing line. This gives a pure comparison of implied probabilities.
If your no-vig price was 52.5% and the closing no-vig was 50%, you got 2.5% better than the market's final estimate — clearly positive CLV.
Tracking CLV
Manual CLV tracking is tedious — it requires recording your price, then coming back after game time to note the closing line, then calculating the difference for every bet.
[Oddible tracks CLV automatically across all your bets →]
