Module 1: Position sizing and stops · Lesson 1 of 8
The 1% rule and risk per trade
3 min read
The 1% rule is a guideline that says you should risk no more than around 1% of your account balance on any single trade. "Risk" here means the amount you would lose if your stop-loss is hit, not the size of the position itself.
Risk is not position size
This is the most common point of confusion. On a $10,000 account, risking 1% means you accept a maximum loss of $100 on the trade. You might control a position worth far more than $100, but your stop-loss is placed so that, if it is triggered, you lose about $100.
Why such a small number?
Losing streaks are a normal part of trading, even for sound strategies. Keeping risk small means a run of losses dents your account rather than destroying it.
Example: Two traders each start with $10,000 and hit a streak of 10 losing trades in a row. Trader A risks 1% of the current balance per trade. Trader B risks 10%.
| Trader | Risk per trade | Balance after 10 losses | Drawdown |
|---|---|---|---|
| A | 1% | about $9,044 | about 10% |
| B | 10% | about $3,487 | about 65% |
Trader A can carry on calmly. Trader B now needs to almost triple the remaining balance just to get back to the start.
Fixed percentage vs fixed amount
Many traders recalculate 1% from their current balance before each trade. As the account shrinks, the amount risked shrinks too, which slows losses. As the account grows, the amount risked grows with it. Others prefer a fixed dollar amount that they review monthly. Either way, the key is deciding your risk before entering.
Is 1% always right?
The figure is a starting point, not a law. Some traders use 0.5% while learning or when conditions are unusual; some experienced traders go slightly higher. What matters is choosing a level small enough that you could survive a long losing streak, both financially and emotionally.
Tip: Also consider total risk across all open trades. Five trades at 1% each on closely related pairs can behave like one 5% bet.
Risk: Stop-losses can slip in fast markets or over weekend gaps, so your actual loss can sometimes exceed your planned 1%.
Key takeaways
- The 1% rule limits the loss on any single trade to about 1% of your account.
- Risk means the loss if your stop is hit, not the position size.
- Small risk per trade helps you survive normal losing streaks.
- Watch your combined risk across related open positions.
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