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Sports Betting Tracker: ROI, Hit Rate and Closing Line Value

·8 min read

The three metrics every serious bettor tracks: ROI, hit rate by odds bucket, and closing line value (CLV). What each one tells you and what it doesn't.

If you only log profit, you can't tell variance from skill. Three metrics — ROI, hit rate by odds bucket, and CLV — give you the full picture.

ROI

ROI = (total winnings − total stakes) / total stakes × 100%

Anything sustained above 3% across 1,000+ bets is excellent. 5%+ is professional-grade. Most "tipsters" who claim 15% are either lucky on a small sample or measuring wrong.

Hit rate by odds bucket

Group bets by odds range (e.g. 1.5–2.0, 2.0–3.0, 3.0+) and look at hit rate per bucket vs implied probability.

  • At 2.0 odds, implied probability is 50%. If you hit 53% on 500 bets in that bucket, you have a real edge.
  • At 5.0 odds, implied is 20%. Hit rates here swing wildly with small samples — you need 1,000+ bets per bucket to draw conclusions.

A good tracker shows hit rate by bucket automatically; Balnceo does this.

Closing Line Value (CLV)

CLV compares the odds you took to the odds at game start (the "closing line"). If you bet at 2.10 and the line closed at 2.00, you got 5% CLV. Sustained positive CLV is the cleanest proof of long-term edge — better than ROI on a small sample.

What to do with the data

  • High ROI, negative CLV: You're running hot. Variance will catch up.
  • Low ROI, positive CLV: You have a real edge but bad luck. Keep going.
  • High ROI, positive CLV: You're actually beating the market. Increase stakes carefully (half Kelly).
  • Negative both: You don't have an edge in this market. Stop.

The discipline that wins

Log every bet. Log it the day you place it, not when it settles. Mark stake, odds at placement, sport, market and bookmaker. After 500 bets you'll know things about yourself no tipster could ever tell you.

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