Risk per trade: picking a percentage you will stick to
How much should you risk on a single trade? The answer is smaller than you think, and the reason is math, not fear.
The standard rule
The standard rule for retail traders is to risk between 0.5 and 2 percent of your account on any single trade. Many full time traders settle around 1 percent. Most new traders start higher and learn the hard way.
There is no perfect number. The right number depends on your strategy, your edge, and your tolerance for losing streaks.
Why a small number is wise
Trading is a game of streaks. Even a strategy with a 60 percent win rate can hit a losing streak of 8 trades in a row. The math:
- If you risk 1 percent and lose 8 in a row, your account is down about 7.7 percent.
- If you risk 5 percent and lose 8 in a row, your account is down about 34 percent.
- If you risk 10 percent and lose 8 in a row, your account is down about 57 percent.
Those are not the worst possible streaks. They are normal. A 1 percent loss makes a normal streak survivable. A 10 percent loss makes a normal streak career ending.
Drawdown and recovery
The drop from a peak in your account to the bottom of a losing streak is called a drawdown. Smaller drawdowns are easier to recover from.
- 10 percent drawdown takes 11 percent gain to recover.
- 20 percent drawdown takes 25 percent gain to recover.
- 30 percent drawdown takes 43 percent gain to recover.
- 50 percent drawdown takes 100 percent gain to recover.
A 50 percent loss is brutal. You have to double the remaining account just to get back to where you started. A 5 percent loss is almost invisible. Small risk keeps you in the game.
How to pick your number
Step 1: Know your strategy's losing streak
If you have a strategy you have backtested, count the longest losing streak in the data. Imagine that streak happens again next month. Pick a risk percent where that streak would not knock you out emotionally or financially.
Step 2: Use a smaller number than you think
Most traders should start at 0.5 percent or 1 percent. You can always increase it after months of consistent results. You can not easily recover from blowing up early.
Step 3: Stay the same across trades
Use the same percentage for every trade in a given strategy. The temptation to bet bigger on a "sure thing" is the most common path to a wiped out account. The sure thing fails more often than you think.
Fixed dollar versus fixed percent
Two ways to set risk:
- Fixed dollar. Risk the same dollar amount every trade. Simple, but does not adjust to your account size.
- Fixed percent. Risk the same percent of your account every trade. Position size grows when you win and shrinks when you lose. This protects you in a slump.
Fixed percent is the standard. CalcMyTrade supports both, so you can choose.
When to lower your risk
- After a losing week, lower risk until you find your form.
- When your strategy stops behaving like it used to.
- When you are tired, distracted, or under personal stress.
- When the market is unusually volatile.
Lowering risk is the calmest way to ride out a bad period. It costs you nothing in good months and saves you everything in bad ones.
When to raise your risk
- After months of consistent, recorded results.
- After backtesting on enough data to trust the strategy.
- When your psychology is stable through losing streaks.
- In small increments, like moving from 1 percent to 1.25 percent.
Raising risk is fine when you have proof. Without proof, you are just guessing harder.
The trap of compounding too fast
Compounding is real, but the fantasy that you will double your account every month is just math fiction. Even great traders rarely compound at 5 percent a month consistently. Going for 20 or 30 percent a month requires risk so high that one bad week ruins everything.
A boring 1 to 2 percent a month, compounded for years, beats most fast scheme returns over the long run.
The summary
- Start small. 0.5 to 1 percent per trade.
- Stay consistent across trades.
- Lower risk when in a slump.
- Raise risk only after proof.
- Track every trade so you know what is real and what is hope.
The traders still in the game in five years are the ones who treat risk like the priority it is.