Win Rate Calculator
Quickly compute win rate with accurate formulas. See amortization schedules, growth projections, and side-by-side comparisons.
Win Rate Calculator
Calculator
Adjust values & calculateEnter your values below. Every result is computed in your browser — no data is sent to any server.
Formula: Win Rate = Wins / Total × 100 | P(N consecutive losses) = (Loss Rate)^N
Worked example — 55% win rate | 1.85% chance of 5 consecutive losses
Formula
Win Rate = Wins / Total × 100 | P(N consecutive losses) = (Loss Rate)^N
Win rate is the percentage of trades that are profitable. Streak probability uses the power rule: the chance of N consecutive wins (or losses) equals the individual probability raised to the Nth power. Expected longest streak in a sample approximates how many consecutive wins/losses to expect over your trading history.
Worked Examples
Example 1: Day Trader Performance
Problem:55 winning trades out of 100 total. What is the probability of 5 consecutive losses?
Solution:Win Rate = 55 / 100 = 55% Loss Rate = 45% P(5 consecutive losses) = 0.45^5 = 0.0185 = 1.85% Expected longest losing streak ≈ log(100) / log(1/0.45) ≈ 5.8 ≈ 6 trades
Result:55% win rate | 1.85% chance of 5 consecutive losses
Example 2: Scalper Statistics
Problem:140 winning trades out of 200 total. Probability of 3 consecutive losses?
Solution:Win Rate = 140 / 200 = 70% Loss Rate = 30% P(3 consecutive losses) = 0.30^3 = 0.027 = 2.7% Profit Factor = 140 / 60 = 2.33
Result:70% win rate | 2.7% chance of 3 consecutive losses | 2.33 profit factor
Frequently Asked Questions
What is a good win rate in forex trading?
A 'good' win rate depends entirely on your risk-to-reward ratio. A trader with a 40% win rate can be highly profitable if their average win is 3x their average loss (3:1 RR). Conversely, a 70% win rate can lose money if the average loss is much larger than the average win. Professional traders typically have win rates between 40-60%. Scalpers often have higher win rates (60-80%) with smaller RR ratios, while swing traders may have lower win rates (35-50%) with higher RR ratios. The key metric is expectancy, not win rate alone.
How many trades do I need for a reliable win rate?
For statistical significance, you need at least 30-50 trades as a bare minimum, but 100+ trades is recommended. With fewer than 30 trades, your win rate has a large margin of error due to small sample sizes. For example, with 20 trades and a measured 60% win rate, the true win rate could easily be anywhere from 40% to 80%. Professional backtesting typically involves 200-500+ trades across different market conditions. The more trades in your sample, the more confident you can be in your measured win rate.
What is the probability of a losing streak?
Losing streaks are mathematically inevitable, even with a high win rate. The probability of N consecutive losses equals (loss rate)^N. With a 50% win rate, there is a 3.1% chance of 5 consecutive losses and 0.1% chance of 10 consecutive losses. With a 60% win rate, there is a 1.02% chance of 5 consecutive losses. Over hundreds of trades, you will experience longer streaks than you expect. This is why risk management and position sizing must account for inevitable drawdowns from losing streaks.
How do I improve my trading win rate?
To improve win rate: 1) Trade with the higher timeframe trend, not against it. 2) Wait for confluence — multiple signals pointing the same direction. 3) Be selective — only take A+ setups, not every signal. 4) Trade during high-volume sessions (London, New York). 5) Avoid trading during major news events unless that is your strategy. 6) Keep a trading journal and review your losing trades for patterns. 7) Focus on specific pairs and setups you understand well. Note that improving win rate often means taking fewer trades and potentially accepting a lower RR ratio.
Is win rate or risk-reward ratio more important?
Neither is more important in isolation — what matters is their combination, measured by expectancy. Expectancy = (Win Rate × Avg Win) - (Loss Rate × Avg Loss). A strategy with 30% win rate and 5:1 RR has expectancy of (0.30 × 5) - (0.70 × 1) = 0.80 per unit risked. A strategy with 80% win rate and 0.5:1 RR has expectancy of (0.80 × 0.5) - (0.20 × 1) = 0.20 per unit risked. The first strategy is actually more profitable despite a much lower win rate. Focus on positive expectancy, not win rate alone.
What breakeven win rate does a given reward-to-risk ratio require?
Expectancy reaches zero at a win rate of 1 divided by one plus the reward-to-risk ratio. At 1:1 that threshold is 50 percent, at 2:1 it falls to 33.3 percent, at 3:1 to 25 percent, while a 0.5:1 setup demands 66.7 percent. Always compare the win rate this tool returns against that threshold rather than against a generic benchmark: 45 percent loses money at 1:1 yet is solidly profitable at 2:1.
How does the calculator estimate the expected longest losing streak?
It applies the approximation log(total trades) divided by log(1 divided by the loss rate). For 100 trades at a 45 percent loss rate that is 4.61 divided by 0.80, which rounds to about 6 consecutive losses. The useful insight is that the longest run scales with sample size, so the same trader with the same edge should expect longer losing sequences across 500 trades than across 50, purely from having more opportunities.
When does the assumption that trades are independent break down?
The power rule behind these streak probabilities treats every trade as an independent coin flip. Live trading breaks that in several ways: one setup repeated inside a single market regime tends to fail as a group, correlated positions such as two dollar pairs held at once are really one bet, and revenge trading after a loss alters the quality of the next entry. Where outcomes are positively correlated, actual losing runs exceed the formula.
What does the profit factor at 1:1 shown here actually mean?
When winners and losers are the same size, gross profit and gross loss are simply trade counts multiplied by a common amount, so the profit factor reduces to wins divided by losses. A 55 percent win rate gives 55 over 45, or 1.22. Treat it as a reference test rather than your real result, because it only holds if your average win truly matches your average loss, and it drops below 1.0 for any win rate under 50 percent.
Should breakeven and scratch trades count in the win rate?
Pick one convention and stay with it, because the choice shifts the number. Removing scratch trades from the sample altogether inflates the rate, since the denominator shrinks while the winner count is unchanged. The more conservative and more common approach keeps a breakeven trade in total trades but out of winners, which nudges the rate down and keeps the streak maths honest. Log scratches as a third bucket so you can see how often you exit flat.
References
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer · Editorial policy
Related Calculators
🧮Backtesting Win Rate Calculator
Calculate strategy win rate, expectancy, and drawdown from backtesting trade results.
🧮Monthly Trading Statistics Calculator
Calculate monthly trading statistics: win rate, average RR, expectancy, and profit factor.
🧮Account Growth Calculator
Project your trading account growth over time given win rate, RR ratio, and risk per trade.
🧮Recovery Factor Calculator
Calculate how many winning trades you need to recover from a drawdown at your current win rate.
🧮Pip Calculator
Calculate pip with inputs, formulas, and instant results.
🧮Forex Margin Calculator
Calculate forex margin with inputs, formulas, and instant results.
🧮Forex Profit Calculator
Calculate forex profit with inputs, formulas, and instant results.
🧮Spread Cost Calculator
Calculate spread cost with inputs, formulas, and instant results.