Win Rate Calculator
Quickly compute win rate with accurate formulas. See amortization schedules, growth projections, and side-by-side comparisons.
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%\nLoss Rate = 45%\nP(5 consecutive losses) = 0.45^5 = 0.0185 = 1.85%\nExpected 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%\nLoss Rate = 30%\nP(3 consecutive losses) = 0.30^3 = 0.027 = 2.7%\nProfit 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.
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 factors influence exchange rate movements?
Key drivers include interest rate differentials between central banks, economic indicators (GDP, employment, inflation), geopolitical events, trade balances, and market sentiment. Central bank policy decisions often cause the largest short-term moves.
What formula does Win Rate Calculator use?
The formula used is described in the Formula section on this page. It is based on widely accepted standards in the relevant field. If you need a specific reference or citation, the References section provides links to authoritative sources.