Losing Streak Probability Calculator
Enter your win rate to see how likely losing streaks are, and whether your current drawdown is normal variance or a real warning sign.
100 trades is a typical benchmark for active traders.
Account Impact (Optional)
See exactly how much your balance drops if the streak hits.
Your result
Very likelyChance of 5+ losses in a row across 100 trades
83%
With a 55% win rate, expect this streak about 1.8 times in 100 trades.
This will happen at some point. It is not a sign your strategy is broken; it is normal variance.
Single streak chance
1.8%
How many times to expect
1.77×
How likely is each streak length in 100 trades?
The formula
Chance of N losses in a row = Loss rate × Loss rate × … (N times)
If your loss rate is 45% (win rate 55%), the chance of exactly 5 losses in a row is: 0.45 × 0.45 × 0.45 × 0.45 × 0.45 = 1.8%. Across 100 trades, that small chance compounds and you will likely encounter it at least once.
How to use this calculator
Enter your strategy's win rate, the streak length you want to check, and how many trades you plan to take. The calculator instantly shows the probability of that streak: both the single-occurrence chance and the likelihood across your full sample.
The optional Account Impact section shows exactly how much your balance would drop if the streak hits, and what percentage gain you would need to recover.
Understanding your results
The most important number is the "chance across N trades" figure. A 60% chance does not mean the streak is rare, it means you should expect it. Professional traders treat losing streaks as a scheduled event, not a crisis.
The bar chart shows the full picture: notice how even short streaks of 3 to 4 losses can be near-certain across a large sample. This is why consistent position sizing matters far more than trying to avoid drawdowns.
What to do during a losing streak
Before reducing risk or stopping your strategy, check whether your streak falls within the expected range for your win rate. If the calculator shows a 70% chance of this streak in your sample size, it is a normal outcome, not evidence of a broken system.
The correct question is not "why am I losing?" The correct question is: "Has anything about my setup changed?" Entries, market conditions, and risk management are worth reviewing. The streak length alone is not a meaningful signal.
Is 6 losses in a row normal? What the math says
Most traders assume a 6-loss streak means their strategy is broken. The math says otherwise. At a 55% win rate, there is a 48% chance of hitting at least one 6-loss streak in 100 trades. That means if you run 100 trades with a solid 55% win rate, there is roughly a coin-flip chance you will hit 6 consecutive losses somewhere in that run.
At a 60% win rate, the chance drops to 35% over 100 trades, which is still not rare. These streaks are a mathematical feature of any system with a non-zero loss rate, not a sign of strategy failure. What matters is whether your position sizing lets you survive them.
Losing streaks and prop firm challenges
Prop firm challenges typically enforce a 5 to 10% total drawdown limit and a 2 to 5% daily drawdown limit. A trader risking 2% per trade who hits 5 consecutive losses drops 9.6% from peak, which can breach a 10% total drawdown limit before the streak ends.
The right approach is to size positions so that your expected maximum streak at your win rate stays inside the total drawdown limit with margin to spare. If the calculator shows a 70% chance of a 5-loss streak in your sample, assume it will happen and plan your risk per trade accordingly.
Use the Account Impact section to find the risk-per-trade level that keeps your expected maximum streak within safe limits for your specific challenge rules.
Common win rates and what to expect
| Win Rate | 5-loss streak (100 trades) | 7-loss streak (100 trades) | Verdict |
|---|---|---|---|
| 40% | 96% | 82% | Expect both regularly |
| 50% | 82% | 55% | Highly likely |
| 55% | 63% | 34% | More likely than not |
| 60% | 43% | 18% | Possible, plan for it |
| 65% | 25% | 8% | Less likely, still possible |
| 70% | 11% | 3% | Rare but can happen |
Approximate values. Use the calculator above for your exact numbers.
How to survive a losing streak without breaking your rules
The only way to survive a losing streak is to have sized for it in advance. Once you are in a streak, the worst decisions you can make are increasing position size to recover faster, or abandoning a system that has not yet had enough trades to prove or disprove itself.
Keep position size identical through the streak.
Review entries for process errors, not outcomes.
Check the probability: is this streak within normal range for your win rate?
Do not make system changes until you have at least 100 trades at the new setting.
Use a pre-agreed rule for when to pause, separate from the streak length itself.