Risk per Trade
Risk per trade is the amount you accept losing if a trade hits its stop, often set as a small fixed percentage of the account such as 1%.
How much should you risk on one trade? It is the single most important number in risk management, because it decides how a normal losing streak affects your account. Risk 1% and ten losses in a row cost about 10%. Risk 10% and the same streak costs about 65%. This entry explains how to set risk per trade, how it connects to stop-loss and position size, and why small numbers win over time.
- Category
- Risk Management
- Reading time
- 5 min
- Also called
- Per-trade risk, 1% rule, 2% rule
- Updated
Risk per trade in plain words
Risk per trade is not the size of your position — it is how much you lose if your stop-loss is hit. A $10,000 position with a stop 2% away risks $200.
Most traders set it as a fixed percentage of the account. A widely taught guideline is the “1% rule”;1 educational material commonly suggests that newer traders risk about 1–3% per trade.2
How to set and apply risk per trade, step by step
Choose a percentage
Pick a small, fixed percentage — for example 1% — that you could lose many times in a row without being knocked out.
Convert it to money
Account × percentage. With $25,000 and 1%, the risk is $250 per trade.
Calculate position size
Shares = risk in money ÷ stop distance per share. A wider stop means fewer shares for the same risk.3 See Position Sizing.
Recalculate as the account changes
Risking a fixed percentage means smaller trades after losses and larger ones after gains.
Cap total open risk
Several open trades add up; limit the combined risk across positions. See Portfolio Heat.
Worked examples
Example 1 — From percentage to shares
SizingAccount $25,000, risk 1%. You want to buy at $40 with a stop at $38.50.
| Risk in money | $25,000 × 1% = $250 |
| Stop distance | $40 − $38.50 = $1.50 |
| Shares | $250 ÷ $1.50 = 166 |
| Position value | 166 × $40 = $6,640 |
The position is about a quarter of the account, but only 1% is at risk if the stop fills at its price.
Example 2 — The same streak at different risk
StreakThree traders each hit 15 losses in a row, risking 1%, 2% and 5% of the current account per trade.
| 1% per trade | Account ≈ 86% of start |
| 2% per trade | ≈ 74% of start |
| 5% per trade | ≈ 46% of start — needs +116% to recover |
Long losing streaks happen even with good strategies. Risk per trade decides whether they are an inconvenience or a disaster. See Drawdown.
Example 3 — Gaps can exceed planned risk
GapA trader risks $250 with a stop $1.50 below entry on 166 shares. Overnight news gaps the stock $4 below entry.
| Planned loss | $250 |
| Actual loss | 166 × $4 = $664 |
Risk per trade is a plan, not a guarantee. Gaps and slippage can make actual losses larger — another reason to keep the percentage small. See Price Gap.
Fifteen losses in a row at 1%, 2% and 5%
Losing streaks at different risk levels
| Aspect | After 5 losses | After 10 losses | After 20 losses |
|---|---|---|---|
| 0.5% per trade | −2.5% | −4.9% | −9.5% |
| 1% per trade | −4.9% | −9.6% | −18.2% |
| 2% per trade | −9.6% | −18.3% | −33.2% |
| 5% per trade | −22.6% | −40.1% | −64.2% |
| 10% per trade | −41.0% | −65.1% | −87.8% |
Why fixed risk per trade matters
Surviving losing streaks
Small risk keeps drawdowns recoverable. See Risk of Ruin.
Consistency
Every trade carries the same weight, so results reflect the strategy rather than random sizing.
Comparable results
Fixed risk makes R-multiples meaningful across trades. See R-Multiple.
Emotional control
Losses of a planned, small size are easier to accept, which reduces revenge trading. See Revenge Trading.
Advantages and disadvantages
Advantages
- Simple rule that limits the damage of any single trade.
- Automatically scales position size with the account.
- Keeps losing streaks survivable.
Disadvantages
- Gaps and slippage can make actual losses exceed the plan.
- Small risk means slower growth in good periods.
- Does not account for correlated positions on its own.
- Choosing the stop dishonestly to fit size defeats the purpose.
Going deeper
Read as far as you need. Each level builds on the one before it.
Risk is about the stop, not the position
Beginner
Two trades of the same size can carry very different risk: a $10,000 position with a 1% stop risks $100; with a 10% stop, $1,000.
Adjusting risk to conditions
Intermediate
Some traders lower risk per trade after a drawdown or in volatile markets, and keep it fixed otherwise. Changing it based on confidence in a single trade usually leads to bigger losses on the trades that feel certain. See Setup Grades (A, B and C Setups).
Optimal fractions and why traders stay below them
Advanced
Formulas such as the Kelly criterion estimate the risk that maximises long-term growth for a known edge. Real edges are uncertain and drawdowns at full Kelly are severe, so most traders risk a small fraction of any such estimate.
Common mistakes
Risking more to recover losses
Raising risk after losses accelerates drawdowns. See Loss Chasing.
Confusing position size with risk
Risk depends on stop distance as well as size.
Moving the stop to fit a bigger position
Place the stop where the idea fails, then size the position.
Ignoring total open risk
Five trades at 2% each is 10% at risk if they move together.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- Risk per trade is what you lose if the stop is hit, not the position size.
- A fixed small percentage — often 1% — is a widely taught guideline.
- Position size = risk in money ÷ stop distance.
- Small risk keeps losing streaks survivable.
- Gaps and slippage can exceed planned risk, so leave a margin of safety.
Frequently asked questions
How much should I risk per trade?
Is the 2% rule better than the 1% rule?
Should risk be a fixed dollar amount or a percentage?
Further learning
- Position Sizing
Turning risk per trade into a share count.
- Stop Loss
Where the risk is defined.
- Drawdown
What losing streaks do at different risk levels.
- Expectancy
How risk per trade scales expected results.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- Fidelity. Managing Risk with the One Percent Rule: What Is It? (opens in a new tab) Checked .
- CME Group. Proper Position Size (opens in a new tab) Checked .
- CME Group. The 2% Rule (opens in a new tab) Checked .
Read more elsewhere
- Trading Metrics (our sister site): Position Sizing (opens in a new tab)
Educational content, not financial advice. Examples use hypothetical prices and simplified costs; actual fees, margin rules and regulations vary by broker, market and country. Trading Metrics is our sister site, under the same ownership; we are not affiliated with any other publisher linked above. Last reviewed . Report an error or request a source credit.