The 1% Risk Rule: How Much to Risk Per Trade
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The 1% rule says you should not lose more than 1% of your account on any single trade. It does not limit how much you put into a trade; it limits how much you can lose if your exit level is hit. That difference is what makes it useful, because the position size falls out of simple arithmetic instead of a feeling. This page shows the arithmetic with example numbers. It is a risk-management idea, not investment advice, and it says nothing about what to buy.
What Does "Risk 1% Per Trade" Actually Mean?
Your risk is the amount you would lose if the trade went against you and closed at your stop. Your position size is how much you buy. People mix these up all the time. You can hold a large position and still risk a small amount, if your stop is close, and you can hold a small position and risk a lot, if your stop is far away or missing.
The rule fixes the risk first. Everything else is worked out from it.
The Position Size Formula
Three steps, in this order:
- Pick the amount at risk. Account size × the percentage you chose.
- Pick the entry and the stop. The gap between them is the loss per unit if the stop is hit.
- Divide. Amount at risk ÷ loss per unit = how many units you can buy.
The stop comes from the chart or your plan, not from the position size you wish you could afford. If the numbers give you a size that feels too small, the answer is not a wider stop. See stop-loss basics for beginners for how stop orders behave.
A Worked Example
All figures below are made-up examples to show the method, not market data and not a suggestion to trade at these levels.
| Step | Example value |
|---|---|
| Account size | $1,000 |
| Risk per trade | 1% = $10 |
| Entry price | $100 |
| Stop price | $95 |
| Loss per unit | $5 |
| Units you can buy | $10 ÷ $5 = 2 |
| Position value | 2 × $100 = $200 |
Notice that the position is $200, only a fifth of the example account, and the possible loss is still $10. Now move the stop to $90 on the same entry. The loss per unit doubles to $10, so the size drops to 1 unit. A wider stop means a smaller position, always.
Why Small Percentages Matter
A loss needs a bigger gain to recover than it took away. In the example account, losing $100 (10%) leaves $900, and getting back to $1,000 takes a gain of about 11%. Lose half and you need to double. Keeping each loss small is what keeps a losing streak survivable, which is the whole point of the rule. Some traders use 0.5% or 2% instead; the percentage is yours to choose, and the method is the same.
Making It a Habit
The rule only helps if you apply it before every trade, including the ones that feel obvious. A simple routine is to write three lines before you buy: the stop price, the amount at risk, and the size the formula gives. If you cannot fill in all three, you are not ready to place the order. Review your last few trades afterwards and check whether the real loss matched the planned one; the gap is usually slippage or fees, and seeing it in your own numbers is more convincing than any rule of thumb.
What the Rule Does Not Cover
- Fees. Entry and exit fees come on top of the price loss. They are small per trade but real; compare them on spot fees, and see maker vs taker fees for why order type changes the bill.
- Slippage. A stop-market order can fill below your stop price in a fast drop, so the real loss can be a bit larger than planned.
- Leverage. With leverage, an exchange can close a position before your own stop is reached. The 1% rule only works if the stop really is the place you exit. Read spot vs futures for beginners and leverage and liquidation price explained before using it.
Where the Exchange Fits In
Fees are part of your risk, so a lower rate helps at the margin. Through coinport's sign-up links, trading fees on the exchange are 20% lower; that applies to trading fees only, not to withdrawal or network fees. The exchange you pick does not change the formula above.
Frequently Asked Questions
Is the 1% rule a limit on how much I can invest?
No. It limits how much you can lose on one trade if your stop is hit. The position itself can be much larger than 1% of the account, as the example above shows.
Do I have to use 1%?
No. It is a common starting point, not a law. The method works the same with 0.5%, 2% or any figure you are comfortable losing on a single trade.
What if I trade without a stop-loss?
Then there is no defined loss per unit and the formula has nothing to divide by. You can still decide your exit level in advance and act on it manually, but the risk is only as limited as your discipline.