A value bet occurs when the probability of an outcome is higher than what the bookmaker's odds imply. For example, if you believe a team has a 60% chance of winning but the bookmaker offers odds implying only 50%, the bet has 10% positive value.

How long until my edge shows through?

This depends on your edge size. A 2% edge may need 500+ bets before variance is overcome. A 10% edge can show through in 100–200 bets. The simulator visualises this with confidence bands around your expected return.

What is the expected value (EV) of a bet?

EV = (win probability × profit) − (loss probability × stake). A bet with positive EV is profitable in the long run. A bet with negative EV loses money over time, regardless of short-term results.

What drawdown should I expect even with an edge?

Even with a genuine edge, drawdowns of 20–40 bankroll units are common over 500 bets. The simulator shows the worst-case drawdown across all simulations to help you set realistic bankroll requirements.

Is finding value realistic for recreational bettors?

It requires significant expertise in a specific market. Most recreational bettors consistently bet at negative value. However, matched bettors and those exploiting promotions can find systematic positive EV opportunities.

Value Bet Simulator

Prove that finding genuine edges works — eventually. See how variance masks your edge short-term, but positive expected value always wins in the long run.

Edge / Value (%)

Decimal Odds

Stake per Bet (£)

Number of Bets

Bankroll (£)

Simulations

Bankroll Growth with Confidence Bands

Median line + 25th-75th percentile (dark band) + 5th-95th percentile (light band)

Probability of Being Profitable Over Time

% of simulations showing profit at each bet count — approaches 100% as sample size grows

Maximum Drawdown Distribution

Worst peak-to-trough drawdown experienced during each simulation

How to Use This Simulator

Set Your Edge

The edge is the percentage by which your true probability exceeds the implied probability from the odds.

Configure Stakes

Set your stake, bankroll, and number of bets to simulate your typical betting volume.

Study the Bands

The confidence bands show the wide range of outcomes — even with a genuine edge, short-term results vary wildly.

The Math Behind It

Understanding Value and Edge

What is a value bet? A value bet occurs when the true probability of an outcome is higher than what the odds imply. If you believe a team has a 55% chance of winning, but the odds imply only 50% (decimal 2.0), you have a 5% edge.

Expected value per bet: With a 5% edge at 2.0 odds, the true win probability is 52.5% (1/2.0 + 0.05 = 0.525). Your expected profit per £10 bet is: 0.525 × £10 - 0.475 × £10 = £0.50, or 5% return on each bet.

Why variance masks your edge: The standard deviation of a single bet at 2.0 odds is approximately £10 (the stake). Your expected profit per bet is just £0.50. The signal-to-noise ratio is 0.50/10 = 5%. It takes many bets for the edge to become statistically significant.

The Law of Large Numbers: As you place more bets, actual results converge toward expected value. After ~400 bets with a 5% edge, you have roughly 95% confidence of being profitable. This is why professional bettors think in terms of thousands of bets, not individual results.

See Also: Calculate your exact optimal stake with the Kelly Criterion Calculator, or check your ruin risk with the Ruin Probability Calculator.

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Frequently Asked Questions

How do I know if I have a genuine edge?

Track your bets over at least 500+ bets and compare your actual win rate to the implied probability of your average odds. A consistent positive difference, validated over a large sample, suggests a genuine edge. Use our Staking Comparison tool to understand if your results are within normal variance.

Why am I losing money if I have an edge?

Short-term variance can easily overwhelm a small edge. With a 5% edge, you'll still have losing months roughly 30-40% of the time over the first 100 bets. This simulator shows exactly how much variance to expect — patience is the key ingredient.

How many bets do I need to prove my edge is real?

As a rough guide: for a 5% edge at even-money odds, you need around 400 bets for 95% confidence of profit. For a 2% edge, you need about 2,500 bets. Smaller edges require much larger samples to distinguish from noise.

What's a maximum drawdown?

Maximum drawdown is the largest peak-to-trough decline in your bankroll during the simulation. Even with a genuine edge, drawdowns of 20-30% of your bankroll are common and expected. Understanding this helps you size your bets appropriately.