How to Analyse Your Betting Results: Key Performance Metrics

Learn the essential metrics for evaluating your betting performance including ROI, strike rate, CLV, and how to interpret your data objectively.

intermediate7 min readLast updated: March 5, 2026Editorial Team
ET

Editorial Team

Betting Expert

Key Takeaways

  • ✓ROI (Return on Investment) is the primary measure of betting performance -- it shows profit as a percentage of total stakes.
  • ✓Strike rate alone is meaningless without considering the odds -- a 30% strike rate at average odds of 4.00 is highly profitable.
  • ✓Closing Line Value (CLV) is the strongest predictor of long-term profitability -- consistently beating the closing line indicates genuine edge.
  • ✓You need a minimum of 500 bets for reliable statistical conclusions -- smaller samples are dominated by variance.
  • ✓Segment your analysis by sport, league, and bet type to identify where your edge exists and where it does not.

Raw profit and loss numbers tell you whether you won or lost, but they do not tell you whether you are a skilled bettor or a lucky one. Proper analysis separates the two.

The Core Metrics

1. Return on Investment (ROI)

Formula: (Total Profit / Total Stakes) x 100

ROI is the universal measure of betting performance. It normalises your results regardless of stake size or volume.

Example:

  • Total stakes: £5,000
  • Total returns: £5,200
  • Profit: £200
  • ROI: (200 / 5,000) x 100 = 4.0%

2. Strike Rate

Formula: (Winning Bets / Total Bets) x 100

Strike rate must always be read alongside average odds. A 40% strike rate at average odds of 2.50 is profitable. A 40% strike rate at average odds of 2.00 is not.

Break-even strike rates by odds:

  • Odds 2.00: 50% needed
  • Odds 3.00: 33.3% needed
  • Odds 5.00: 20% needed

3. Closing Line Value (CLV)

CLV measures whether you consistently take odds better than the closing line. It is the strongest predictor of long-term profitability.

Example:

  • You bet at odds of 2.20
  • Closing odds: 2.05
  • CLV: (2.20 / 2.05 - 1) x 100 = +7.3%

Segmenting Your Analysis

Overall ROI is useful, but segmented analysis reveals where your edge actually lives.

Segment by:

  • Sport -- Are you profitable in football but losing in tennis?
  • League -- Do you perform better in the Championship than the Premier League?
  • Bet type -- Are your Asian handicap bets profitable while your accumulators lose?
  • Odds range -- Do you perform better on favourites or underdogs?
  • Day of week -- Do midweek bets outperform weekend bets?

Step-by-Step Analysis Process

  1. Export your betting diary data into a spreadsheet
  2. Calculate overall ROI across all bets
  3. Filter by segment (sport, league, bet type) and calculate ROI for each
  4. Identify profitable segments -- these are where your edge exists
  5. Identify losing segments -- consider whether to stop betting in these areas
  6. Check CLV -- confirm whether profitable segments show positive CLV

Common Pitfalls

Survivorship Bias

Ignoring losing bets or only analysing winning periods gives a false picture. Analyse everything.

Insufficient Sample Size

Drawing conclusions from 50 bets is statistically meaningless. Wait for 500+ before making strategic changes.

Ignoring Variance

A 10-bet losing streak does not mean your strategy is broken. Calculate the expected variance for your strike rate and odds range to understand normal fluctuation.

Rigorous performance analysis is what separates informed bettors from hopeful ones. The metrics exist -- the question is whether you are willing to apply them honestly.

Frequently Asked Questions

What is ROI in betting?+
ROI (Return on Investment) measures your profit as a percentage of total stakes. The formula is: (Total Profit / Total Stakes) x 100. For example, if you staked £10,000 and your profit is £400, your ROI is 4%. A positive ROI means you are profitable; negative means you are losing.
What is a good ROI for sports betting?+
A sustained ROI of 2-5% over 1,000+ bets is considered very good. Professional bettors typically achieve 3-7%. Anything above 10% sustained over a large sample is exceptional and rare. Be sceptical of anyone claiming 20%+ ROI -- it is almost always a small sample or selective reporting.
What is Closing Line Value?+
Closing Line Value (CLV) measures whether the odds you took were better than the final odds before the event started. If you consistently bet at higher odds than the closing line, you are capturing value. CLV is considered the most reliable predictor of long-term betting success.
How many bets do I need before analysing my results?+
At least 500 bets for a broadly reliable analysis, and 1,000+ for strong statistical confidence. With fewer than 200 bets, variance dominates and results tell you very little about your true ability. The higher the average odds, the more bets you need.
Why might I be winning but still not have an edge?+
Variance. Over 100 bets, a losing bettor can easily appear profitable by chance. This is why sample size matters. A bettor with no edge can win 55% of even-money bets over 100 attempts purely through luck. Only sustained performance over 1,000+ bets provides confidence.

Bet Responsibly

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How to Analyse Your Betting Results: Key Performance Metrics | Betmana - Sports Betting