Closing Line Value: The Only Honest Scoreboard in Betting
Wins and losses are mostly luck in the short run. Closing line value compares your price with the last price before kickoff, and our paper strategies show what no edge looks like.
Last reviewed November 3, 2026
Key takeaways
- >CLV = your odds ÷ closing odds − 1: backed at 2.20, closed at 2.00 = +10%
- >It does not depend on the result and stabilises far faster than profit
- >Our three rule strategies averaged almost exactly zero CLV, matching their no-edge results
- >Our closing line is the last price we recorded (once a day), so late moves are often missing
- >Track it yourself: note the price you took and the price just before kickoff
Wins and losses are a terrible way to judge a bettor in the short run: luck drowns everything (see How many bets before a result means something?). Professional bettors use a different scoreboard, one that says something after dozens of bets instead of thousands: closing line value.
What it is
The closing line is the last price before kickoff. By then the market has absorbed nearly everything: team news, line-ups, the money of the sharpest bettors. It is the best estimate of the true chance the market will ever produce.
Closing line value (CLV) compares the price you took with that closing price:
CLV = your odds ÷ closing odds − 1
You backed a team at 2.20 and it closed at 2.00: CLV = 2.20 / 2.00 − 1 = +10%. You got a price the market later decided was too long. Backed at 2.00 and it closed at 2.20: −9%.
Why it works as a scoreboard
- It does not depend on the result. A bet can lose and still have been a good price, or win at a bad one.
- It stabilises quickly. Because the closing price is such a good estimate of the true chance, consistently beating it is strong evidence of an edge long before the profit becomes reliable.
- It is what bookmakers watch. A customer who regularly beats the closing line is a customer who is likely to win in the long run, and that is often the moment accounts get limited.
Our own paper strategies, measured
For our paper strategies, we compared each bet's price with the last price we recorded at the same venue before kickoff:
Strategy | Bets | Average CLV | Beat the close | Worse than the close | Same |
|---|---|---|---|---|---|
Home/away favourites under 1.80 | 210 | +0.30% | 47% | 41% | 11% |
Eredivisie: Over 2.5 on every match | 80 | −0.03% | 29% | 46% | 25% |
Premier League totals under 1.30 | 238 | −0.17% | 24% | 29% | 47% |
All three average almost exactly zero, and that matches their results: none showed an edge (see Paper betting). These rules placed their bets at prices that were neither better nor worse than where the market ended up. A strategy with a real edge would show a clearly positive average here.
What our data cannot see (yet)
Honesty about our own measurement:
- Our "closing line" is the last price we recorded, not the very last price before kickoff. We collect prices once a day, usually in the morning, so late moves (line-ups, late money) are often missing.
- Our AI strategy is not measurable yet. Its bets were placed after the last collection run before those matches, so there is no later price to compare with. That is why "same" is so common in the table above, too: no recorded move is not the same as no move.
To measure CLV properly you need prices close to kickoff. For your own betting, a screenshot of the price just before kickoff is enough.
How to use it yourself
- Write down the price you took and the venue.
- Note the price just before kickoff at the same venue.
- After 50–100 bets, look at your average CLV. Consistently positive: you are probably doing something right, even through a losing run. Around zero or negative: your profits, if any, are probably luck.
How we measured this: Edge Terminal paper accounts (flat €10, Toto prices), August – October 2026. Closing price: the last price recorded before kickoff at the same venue, market and outcome; once-a-day collection. Bets with no recorded price after placement count as "same". Snapshot taken 3 November 2026. Nothing here is a tip.