Breakeven win rate
The breakeven win rate is the share of winning trades at which a strategy's expectancy is exactly zero, given the average win, the average loss and the costs per trade. Before costs it equals 1 ÷ (1 + payoff ratio); any cost per trade raises it.
Senzoukria · Glossary · Updated September 2026
At a glance
- Without costs
- W = 1 ÷ (1 + R), R = average win ÷ average loss
- With cost c per trade
- W = (L + c) ÷ (G + L), G and L gross average win and loss
- 2:1 example
- 33.3% before costs
- Use
- Minimum win rate a measured sample must clearly exceed
The formula
Expectancy per trade is W × average win − (1 − W) × average loss. Setting it to zero and solving for W gives W = average loss ÷ (average win + average loss), which is 1 ÷ (1 + R) when R is the payoff ratio. With a gross average win G, a gross average loss L and a round-trip cost c paid on every trade, winners are worth G − c and losers cost L + c, so the breakeven becomes (L + c) ÷ (G + L).
Costs matter most when G and L are small. On a target of 40 dollars and a stop of 20 dollars per contract, a cost of 2 dollars moves the breakeven from 33.3% to 22 ÷ 60 ≈ 36.7%.
Breakeven by reward-to-risk ratio
| Payoff ratio (win ÷ loss) | Breakeven win rate |
|---|---|
| 0.5 | 66.7% |
| 1 | 50.0% |
| 1.5 | 40.0% |
| 2 | 33.3% |
| 3 | 25.0% |
| 4 | 20.0% |
Comparing it with a measured win rate
A measured win rate is an estimate. On 100 trades, a 55% win rate has a 95% confidence interval of roughly 45% to 65%. If the breakeven is 50%, that sample does not establish that the strategy clears it. The question is not whether the point estimate beats the breakeven, but whether the whole plausible range does.
The planned reward-to-risk ratio gives a first breakeven before any trade is taken. The realized payoff ratio, measured after exits before target, partial fills and slippage, gives the one that actually applies.
In Senzoukria
The Long and Short position tools on the chart show a read-only R:R badge, 2.00 : 1 by default, so the planned breakeven of a setup is readable before it is traded. After a replay or a backtest, the session report and the Performance panel give Win rate and Payoff (win/loss) side by side, from which the realized breakeven follows. A setup in the journal Playbook can carry a target win rate, but it is a reminder on the card: nothing in the software checks trades against it.
Related
In the same section
- Bridge
- Breakeven stop
- Butterfly spread
- Bracket order
- Buy-side and sell-side liquidity
- Bootstrap
- Buying and selling pressure
- Book depth
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Frequently asked questions
- Why is my strategy losing with a win rate above the breakeven I planned?
- Because the planned breakeven used the planned reward-to-risk ratio. If trades are often closed before target, or stops slip, the realized payoff is lower and the true breakeven higher. Recompute it from the realized average win and loss, net of costs.
- Does a high breakeven win rate mean a bad strategy?
- Not by itself. Scalping styles with small targets need high win rates and can be consistent. The risk is that costs are a large share of each trade, so a small change in fees or slippage moves the breakeven a lot. Test the result with higher costs.