{"id":34,"date":"2026-05-19T05:35:36","date_gmt":"2026-05-19T05:35:36","guid":{"rendered":"http:\/\/docs.traderis.me\/en\/docs\/losing-streak-money-management\/"},"modified":"2026-06-06T04:30:21","modified_gmt":"2026-06-06T04:30:21","password":"","slug":"losing-streak-money-management","status":"publish","type":"docs","link":"https:\/\/docs.traderis.me\/en\/docs\/losing-streak-money-management\/","title":{"rendered":"Losing Streak Money Management \u2014 Sizing Positions Backwards from Risk of Ruin"},"content":{"rendered":"\n
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\ud83d\udccc Key Takeaway<\/p>\n\n\n\n

Losing streaks are not rare misfortune \u2014 they are a statistical certainty. At a 50% win rate with 500 trades per year, a 7-loss streak occurs with 97% probability. Fix per-trade risk at 1\u20132% of account equity and even a 10-loss streak keeps drawdown under 18%, letting you trade on with a clear head.<\/p>\n<\/div><\/div>\n\n\n\n

“Before I knew it I’d taken 7 losses in a row and my discipline collapsed.” “I tried to win it all back with oversized lots and blew up the account.” These accidents have nothing to do with market difficulty \u2014 they happen because the probability of a losing streak was never calculated in advance<\/strong>. Losing streaks are guaranteed probabilistic events<\/strong>. If you size positions assuming they will happen, they don’t cause accidents.<\/p>\n\n\n\n

This article covers: the formula for “probability of N consecutive losses” given a win rate, the actual drawdown numbers during streaks, how to size positions backwards from Risk of Ruin, and the specific things you must not do during a losing streak. Reading The 1% Rule<\/a> and Maximum Drawdown Explained<\/a> first will tie the numbers together.<\/p>\n\n\n\n

Losing Streaks Aren’t “Possible” \u2014 They’re “Inevitable”<\/h2>\n\n\n\n

For independent trials at a given win rate, the probability that a streak of N consecutive losses occurs at least once<\/strong> in M trades approaches 100% as M grows. Don’t think of it as “it might happen someday” \u2014 it happens multiple times per year<\/strong> for active traders.<\/p>\n\n\n\n

P(at least one N-streak in M trades) \u2248 1 \u2212 (1 \u2212 p^N)^(M\u2212N+1)<\/strong>\n\np = 1 \u2212 win rate   (loss probability per trade)\nM = total number of trades\nN = streak length<\/pre>\n\n\n\n
Probability of N-streak by win rate (500 trades \u2248 1 year)<\/h3>\n\n\n\n
\n\n
Win rate<\/th>5 in a row<\/th>7 in a row<\/th>10 in a row<\/th>15 in a row<\/th><\/tr><\/thead>\n
70%<\/td>11%<\/td>1%<\/td><0.1%<\/td>0%<\/td><\/tr>\n
60%<\/td>53%<\/td>10%<\/td>0.4%<\/td><0.1%<\/td><\/tr>\n
50%<\/td>>99%<\/td>97%<\/td>34%<\/td>1.5%<\/td><\/tr>\n
40%<\/td>>99%<\/td>>99%<\/td>97%<\/td>33%<\/td><\/tr>\n
30%<\/td>>99%<\/td>>99%<\/td>>99%<\/td>96%<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n
A 50%-win-rate trader running 500 trades a year hits 7 in a row with 97% probability<\/strong>. Even if it feels rare, you’ll see it multiple times per year<\/strong>. A 40%-win-rate strategy hits 5 in a row almost certainly, and 10 in a row with 97%.<\/p>\n\n\n\n
So the question isn’t “how do I avoid losing streaks” \u2014 it’s “how do I design positions so a losing streak doesn’t blow me up”<\/strong>.<\/p>\n\n\n\n
Real Drawdown Numbers During a Streak<\/h2>\n\n\n\n
Given per-trade risk % and a streak length, drawdown compounds:<\/p>\n\n\n\n
Balance after streak = Initial \u00d7 (1 \u2212 Risk%)^StreakLength<\/strong>\nDrawdown (%) = 1 \u2212 (1 \u2212 Risk%)^StreakLength<\/strong><\/pre>\n\n\n\n
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Risk per trade<\/th>DD after 5<\/th>DD after 7<\/th>DD after 10<\/th>DD after 15<\/th><\/tr><\/thead>\n
1%<\/td>4.9%<\/td>6.8%<\/td>9.6%<\/td>14.0%<\/td><\/tr>\n
2%<\/td>9.6%<\/td>13.2%<\/td>18.3%<\/td>26.1%<\/td><\/tr>\n
3%<\/td>14.1%<\/td>19.2%<\/td>26.3%<\/td>36.7%<\/td><\/tr>\n
5%<\/td>22.6%<\/td>30.2%<\/td>40.1%<\/td>53.7%<\/td><\/tr>\n
10%<\/td>41.0%<\/td>52.2%<\/td>65.1%<\/td>79.4%<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n
1% risk \u2192 10 in a row = ~10% DD. But 5% risk \u00d7 10 in a row = 40% DD, and 10% risk \u00d7 10 in a row = 65% DD. A 65% DD needs +186% return to recover<\/a> \u2014 practically unrecoverable.<\/p>\n\n\n\n
Backwards-Sizing Positions from Risk of Ruin<\/h2>\n\n\n\n
From your tolerable DD during a streak (= the maximum drawdown you can mentally survive), you can solve for per-trade risk %:<\/p>\n\n\n\n
Risk% = 1 \u2212 (1 \u2212 TolerableDD)^(1 \/ StreakLength)<\/strong>\n\nExample: \"tolerate up to 15% DD over a 7-loss streak\"\nRisk% = 1 \u2212 (1 \u2212 0.15)^(1\/7)\n      = 1 \u2212 0.85^0.143\n      = 1 \u2212 0.977\n      \u2248 2.3%<\/pre>\n\n\n\n
Tolerable DD \u00d7 Assumed Streak \u2192 Max Risk % Cheat Sheet<\/h3>\n\n\n\n
\n\n
Tolerable DD<\/th>5-loss streak<\/th>7-loss streak<\/th>10-loss streak<\/th>15-loss streak<\/th><\/tr><\/thead>\n
10%<\/td>2.1%<\/td>1.5%<\/td>1.0%<\/td>0.7%<\/td><\/tr>\n
15%<\/td>3.2%<\/td>2.3%<\/td>1.6%<\/td>1.1%<\/td><\/tr>\n
20%<\/td>4.4%<\/td>3.1%<\/td>2.2%<\/td>1.5%<\/td><\/tr>\n
30%<\/td>7.0%<\/td>5.0%<\/td>3.5%<\/td>2.3%<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n
For example, if you assume “up to 10 losses in a row, with at most 20% DD,” your max per-trade risk is 2.2%<\/strong>. If your mental ceiling is 15% DD, drop to 1.6%<\/strong>. The 1% rule is a conservative design \u2014 it survives 15 in a row at only 14% DD, as the table shows.<\/p>\n\n\n\n
The Four Worst Moves During a Losing Streak<\/h2>\n\n\n\n
1. Martingale (double after each loss)<\/h3>\n\n\n\n
“Win it all back at double size” repeated 7 times needs 128x<\/strong> the initial margin. You’ll run out of equity or hit a forced stop-out long before the math saves you. Martingale “looks like 100% win rate” only in math without finite capital. Real accounts always have a ceiling.<\/p>\n\n\n\n
2. Averaging down (adding to a losing position)<\/h3>\n\n\n\n
“Lower my average entry \u2014 if it bounces, I’m green” sounds clever, but in a sustained adverse move, losses grow exponentially, not linearly<\/strong>. It’s the direct opposite of the 1% rule and the #1 cause of pushing MDD past 50% in a single accident.<\/p>\n\n\n\n
3. Widening the stop<\/h3>\n\n\n\n
“My stop keeps getting hit” \u2192 moving the stop from 30 pips to 60 pips doubles per-trade risk<\/strong>. Widening the stop without proportionally cutting the lot silently breaks the 1% rule. Rule: if you widen the stop, shrink the lot in proportion<\/strong>.<\/p>\n\n\n\n
4. Off-system trades (revenge trading)<\/h3>\n\n\n\n
The biggest trap is emotionally-driven entries outside your tested rules<\/strong>. Discretionary trades that abandon your edge are essentially random \u2014 negative EV. Bleeding a shrunken account with negative-EV behavior is the classic ruin pattern.<\/p>\n\n\n\n
The Right Actions During a Streak<\/h2>\n\n\n\n