Why Win Rate Is a Terrible Metric for Serious Bettors
The Flaw in Win Rate: A Serious Bettor's Guide
The Problem with Win Rate
Win rate is a flawed metric for serious bettors. It fails to account for breakeven win rates at -110, where a 50% win rate is required just to break even. Closing line value grades the decision, not the coin flip.
What Does This Mean?
Imagine you have a system that wins 55% of the time. Sounds good? Not so fast! If you're paying -110 odds (a common vig), your actual win rate needs to be higher than 50% just to break even. The vig eats into your profits, making it harder to achieve a positive return.
The Math Behind It
Let's look at an example:
| Win Rate | Actual Win Rate (breakeven) |
|---|---|
| 50% | 50.0% |
| 52% | 51.1% |
| 55% | 54.5% |
As you can see, the actual win rate required to break even increases as the vig does.
Why Signal Cares
We publish this information to promote transparency and process-oriented thinking in the betting community. By understanding the limitations of win rate as a metric, serious bettors can make more informed decisions about their strategies and avoid common pitfalls.
Ask Signal (3 example questions)
* Q: "I have a system that wins 60% of the time. Is it [redacted]d to make money?"
A: No, not necessarily. You need to consider the vig and actual win rate required to break even.
* Q: "Why is CLV (Closing Line Value) a better metric than win rate?"
A: Because CLV takes into account whether you beat the market consensus, providing a more accurate picture of your process quality over the long run.
* Q: "I'm using a system that has a 55% win rate. Is it working well?"
A: Not necessarily. You need to calculate the actual win rate required to break even, taking into account the vig.
Disclaimer: Research only · estimates only · not betting advice.