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Breakeven Win Rate Calculator

A win rate means nothing without the reward-to-risk beside it. Enter your R:R to see the win rate that breaks even, then enter the win rate you actually achieve to see the expectancy — the average R a trade returns over the long run.

Calculate breakeven and expectancy

2 means a winner returns twice what a loser costs.

Measured over a few hundred trades, not thirty.

Breakeven win rate
33.3%
Expectancy per trade
+0.20R
Edge over breakeven
+6.7%
Expected return over 100 trades
+20.00R

Expectancy is the average R a trade returns over the long run. Positive is an edge; anything at or below zero means the win rate does not clear the ratio, however respectable it looks on its own.

Do you know your real win rate, or your remembered one?

tradempower computes win rate, average R and expectancy from your closed trades, broken down by strategy — so you find out which playbook is carrying the account. Seven days of Pro, no card.

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How to calculate breakeven win rate

If a loser costs 1R and a winner returns R times that, the breakeven win rate is:

Breakeven win rate = 1 ÷ (1 + reward-to-risk)

At 1:1 that is 1 ÷ 2 = 50%. At 1:2, 1 ÷ 3 = 33.3%. At 1:3, 25%. The pattern is worth internalising: every increment of reward-to-risk buys you a lower bar to clear, and the improvement is steepest at the low end.

Expectancy: the number that decides everything

Expectancy is what a trade returns on average, in R:

Expectancy = (win rate × reward-to-risk) − (1 − win rate)

A strategy winning 40% of the time at 1:2 returns (0.4 × 2) − 0.6 = +0.2R per trade. Over 200 trades that is +40R, which at 1% risk is a 40% gross return before costs. A strategy winning 60% at 1:0.5 returns (0.6 × 0.5) − 0.4 = −0.1R — a losing system with a win rate most traders would be proud of.

Win rate is the most quoted and least informative statistic in trading. Expectancy is the one to optimise, and it is the only one of the two that can be negative while the other looks excellent.

Why a high win rate can still lose money

High win rates usually come from taking small profits quickly and giving losers room. That feels good — most days close green — and it is arithmetically fragile: a single loss at 4R erases eight wins at 0.5R. The equity curve climbs gently and gaps down, which is also the hardest shape to hold your nerve through.

The mirror image is a trend-following profile: 35% win rate, a long string of small losses, and occasional outsized winners that carry the year. It is statistically sound and psychologically brutal, which is why so few traders run it for long. Neither profile survives poor sizing.

Common mistakes with win rate

  • Judging a strategy on win rate alone. Without the reward-to-risk beside it the figure is not interpretable at all.
  • Using a planned R:R with a realized win rate. Mixing what you intended with what happened produces an expectancy that describes neither.
  • Sampling too few trades. Thirty trades cannot distinguish a 45% system from a 55% one; expectancy needs a few hundred before it settles.
  • Ignoring costs. Commission and slippage reduce the reward leg, which raises the breakeven win rate above the clean-price figure.
  • Counting scratches as wins. A breakeven exit is neither, and folding it into the win column inflates the rate without adding a cent.

Measure your real numbers

Both inputs here are things most traders estimate and few measure. tradempower computes realized win rate, average R and expectancy from your closed trades — and breaks them down by strategy, so you can see which playbook is actually carrying the account.

Breakeven win rate by reward-to-risk

Reward-to-riskBreakeven win rate
1:0.566.7%
1:150.0%
1:1.540.0%
1:233.3%
1:2.528.6%
1:325.0%
1:420.0%
1:516.7%

Breakeven Win Rate Calculator FAQ

What win rate do I need to be profitable?

It depends entirely on your reward-to-risk. At 1:1 you need to win more than 50% of trades; at 1:2, more than 33.3%; at 1:3, more than 25%. Any win rate above the breakeven figure for your ratio is profitable before costs.

What is a good expectancy?

Anything positive is an edge; the question is whether it is large enough to survive costs and variance. Many profitable discretionary systems sit between +0.1R and +0.4R per trade. Values much above that are usually a sign of a short sample rather than an exceptional system.

Can a 30% win rate be profitable?

Yes, comfortably — at 1:3 the breakeven is 25%, so a 30% win rate returns +0.2R per trade. Most trend-following approaches live here. The difficulty is behavioural rather than mathematical: it means long stretches of losing trades with the system working exactly as designed.

How many trades before my win rate means anything?

More than most traders assume. Thirty trades is noise — a 40% system can easily produce 55% over that span. Treat a few hundred trades as the point at which expectancy starts to stabilise, and read anything shorter as a hint rather than a measurement.

Do commissions change the breakeven win rate?

Yes. Costs come out of the reward leg, so a nominal 1:2 setup might be 1:1.8 net, lifting the breakeven from 33.3% to 35.7%. The effect is largest for short-hold, tight-stop strategies where costs are a big share of the move.

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