Risk management : the 1% rule explained (sizing, drawdown, survival)

If I had to keep only one rule of all trading, it would be this: never risk more than 1% of your capital on a single trade. Not because it looks good on paper, but because that is the mathematical difference between an account that survives and an account that explodes.

The 1% rule has nothing to do with superstition. It is a survival calculation. It starts from a reality many refuse to accept: losing streaks are inevitable. Even a strategy with a statistical edge can suffer a long sequence of losses. The relevant question is whether your risk remains tolerable when that happens. The 1% rule helps determine whether your account survives it.

In this article, I show you why this rule exists, how to calculate your position size concretely, and the brutal mechanics of drawdown that explain everything.

Get the free position calculator →

The rule in one sentence

On every trade, your maximum loss you accept (if your stop is hit) must never exceed 1% of your total capital.

Account of €10,000 → max risk of €100 per trade. Account of €50,000 → €500. That's it. The 1% does not concern the size of your position in euros, but the loss if the stop is triggered. A nominal position of $100,000 can only risk $100 if the stop is tight. This nuance is what many miss.

Why 1% and not 5 or 10%

Because drawdown mechanics are asymmetric and unforgiving. Look at what you need to gain to get back to equilibrium after a loss:

• Loss of 10% → requires +11% to recover.
• Loss of 25% → requires +33%.
• Loss of 50% → requires +100% (you must double just to find the starting point).
• Loss of 75% → requires +300%.

Do you see the trap? The more you lose, the disproportionate the recovery becomes. An account at -50% is not "half dead"; it is very difficult to recover, because doubling a capital is much harder than dividing it by two.

Now apply this to a series of losses. With a risk of 8% per trade, 6 consecutive losses put you at approximately -40%. You then need +67% just to get out. With a risk of 1% per trade, those same 6 losses cost you barely -6%. It recovers in a few winning trades. Same strategy, same losing streak — but one account is dead and the other merely scratched. That's why the 1% rule exists.

How to calculate your position size

The formula is simple, and it must be calculated before every trade:

Position Size = (Capital × 1%) ÷ (Stop distance in points × Point value)

A concrete example on NQ futures:

• Capital: $25,000 → max risk of 1% = $250.
• Entry at 20,150, stop at 20,140 → distance = 10 points.
• Cost of 10 points on 1 NQ contract (tick value $5 per tick, 4 ticks per point = $20 per point) = 10 × $20 = $200.

Since $200 is under the budget of $250: 1 contract passes. If the stop distance was 20 points ($400), 1 contract would exceed the budget → the trade is skipped, or you wait for a tighter stop. Sizing adjusts to the stop distance, never the other way around. You should never place your stop at the price just to "enter bigger" — that's an open door to systematic stop-outs.

Daily and weekly risk limits

The 1% per trade is not enough on its own. Add two safeguards:

• Maximum daily loss: 2–3% of capital. Once this limit is reached during the day, you close the platform. This prevents turning a bad day into a disaster via revenge trading.
• Maximum weekly loss: 5–6%. Beyond that, take time off, review your journal, and do not force trades.

These ceilings are not cowardice. They acknowledge a truth: some days, you are out of rhythm with the market, and the best trade is to stop.

What the 1% rule does NOT do

Be honest about its limits. The 1% rule will not make you profitable. It does not compensate for a strategy without positive expectancy. If your edge is negative, the 1% rule will just make you lose more slowly — which is already useful to learn from, but won't make you rich.

The 1% is a rule of preservation, not profit generation. It keeps you alive long enough for your edge (if you have one) to express itself over many trades. It's a necessary condition, not sufficient. Without it, even the best strategy will ruin you on a losing streak. With it, an mediocre strategy gives you time to learn.

Should I always risk exactly 1%?

Not dogmatically. A beginner should aim for 0.5% while validating their strategy with real data. An experienced trader with a proven edge can go up to 1%, rarely more. Beyond 2% per trade, it's gambling.

The idea is not the exact number, but the principle: fixed, low, and constant risk. Variable risk that climbs on "safe" trades (which are often emotional) is exactly what kills accounts.

Key takeaways

The 1% rule limits max loss per trade to 1% of capital, calculated before entry by adjusting position size based on stop distance. Its purpose: drawdown is asymmetric (losing 50% requires +100% to recover), and losing streaks are inevitable. With 1% risk, a black swan event scratches; with 8%, it kills. Add a daily loss ceiling (2-3%). It's a survival rule, not for gains — but without it, no edge survives.

Trading involves the risk of capital loss. Educational content only, not investment advice.