What is Closing Line Value?
The difference between the line you bet and the closing line at the same book — the most predictive single metric of long-run edge.
Also known as: CLV
The closing line is the sharpest line a market ever sees because every dollar that wants in has already weighed in by then. If you consistently bet at numbers better than close, you are beating the consensus and long-run EV follows. Most professional bettors prioritise CLV as the leading indicator and ROI as the lagging confirmation.
Example
You bet Lakers −5.5 at −110. By tip-off the line has moved to −7. You beat the close by 1.5 points — that is positive CLV.
Related terms
Expected value (EV) is the average profit or loss a bet pays per dollar staked if you repeated it under the same odds and probability forever.
Betting only when your estimated win probability is higher than the bookmaker's implied probability.
Comparing prices at multiple sportsbooks to bet the best available number on every play.
See closing line value applied to a real slate
NotaSportsGuru runs the math behind every published leg — Parlay of the Day, player props, match lines — with the model’s expected value and edge on every line.