Risk management in forex: the order that decides whether you survive
Decide the loss, place the stop where the idea is wrong, size from both. Why losing streaks are longer than you think, why recovery is not symmetrical, and the four limits that belong in any plan.
Risk management is deciding, before you enter, how much this trade is allowed to cost you, and sizing the position so that it cannot cost more. Everything else in this field is secondary to that sentence, and most accounts that fail do so without ever having applied it.
The order that everything depends on
There is a correct sequence and a common one, and they are reverses of each other.
| Correct | Common |
|---|---|
| 1. Decide the money at risk | 1. Decide the position size |
| 2. Place the stop where the idea is wrong | 2. Place the stop where the loss feels bearable |
| 3. Calculate the size from 1 and 2 | 3. Hope |
In the correct order the stop goes where the market proves your reasoning wrong, and the size adapts to it. In the common order the stop goes where the size allows, which means it sits at an arbitrary price with no relationship to the trade, and it gets hit by noise. The trader then concludes that stops do not work.
How much per trade
The convention is 1% to 2% of equity. The convention is not magic, but the reasoning behind it is worth understanding rather than memorising.
What a fixed percentage buys you is survival through a losing streak. Streaks are longer than intuition suggests: a system that wins half its trades will, over a few hundred trades, produce runs of eight or ten losses in a row purely by chance. Nothing has broken when that happens.
| Risk per trade | After 10 consecutive losses |
|---|---|
| 1% | -9.6% |
| 2% | -18.3% |
| 5% | -40.1% |
| 10% | -65.1% |
At 1% a ten-loss run is an inconvenience. At 10% it is close to over, and worse, it is over psychologically well before it is over mathematically.
Why losses hurt more than gains help
Recovery is not symmetrical, and the asymmetry accelerates:
| Drawdown | Gain needed to get back |
|---|---|
| 10% | 11.1% |
| 25% | 33.3% |
| 50% | 100% |
| 75% | 300% |
| 90% | 900% |
This is the whole argument for caring about drawdown more than about returns. A strategy that makes 40% and draws down 50% is worse than one that makes 15% and draws down 8%, and the first one is the one that gets advertised.
The calculation, every time
- Equity × risk percentage = money at risk.
- Measure the stop distance in pips.
- Money ÷ pips = value per pip you can afford.
- Convert to lots and round down.
Example: $3,000 equity, 1% risk, 45 pip stop on EUR/USD. That is $30 ÷ 45 = $0.667 per pip, which is 0.0667 lots, rounded down to 0.06. Actual risk $27. The position size calculator does this.
What risk management is not
- It is not a stop loss on its own. A stop with the wrong position size behind it is a bigger loss taken politely.
- It is not a high win rate. A system winning 90% of the time loses money if the losses are twelve times the wins. Win rate without the size of wins and losses tells you nothing.
- It is not diversification by opening more pairs. EUR/USD, GBP/USD and AUD/USD all move against the dollar. Three positions can be one bet wearing three hats, and correlated positions multiply exposure exactly when things go wrong.
- It is not a guarantee. A weekend gap can open past your stop, and the fill will be on the other side of it.
The limits that belong in the plan
Per-trade risk is the first limit, not the only one:
- Daily loss limit. A percentage that stops you for the day. It exists to interrupt the sequence where a loss is chased by a larger trade.
- Total open risk. The sum of what all open positions can lose, capped. Without this, six trades at 1% is a 6% bet.
- Correlation cap. Count positions exposed to the same currency as one.
- Maximum drawdown. The level at which you stop and review rather than continue.
These four are also, not coincidentally, the rules that funded account programmes enforce on their traders. They enforce them because they work.
Automated systems and the same rules
A trading robot follows its rules without flinching, which is an advantage, and it will also follow a bad sizing rule off a cliff without flinching, which is not. Before running any automated system, three questions:
- Does it use a fixed lot, or does it size from a risk percentage?
- Does every position carry a stop loss, or does it rely on an exit signal that may not come?
- Does it ever add to a losing position? If yes, what is the maximum sequence, and what does the whole sequence cost if it never recovers?
That third question is the one that matters most, and it is answered in the MetaTrader section, where each system’s inputs are laid out.
What to read next
- Lots: position size in practice.
- Margin: what happens when sizing goes wrong.
- Position size calculator.
- Risk calculator.
Frequently asked questions
How much should I risk per trade?
The convention is 1% to 2% of equity, and the reasoning matters more than the number: it buys survival through a losing streak. A system that wins half its trades will produce runs of eight or ten losses by chance. At 1% that is a 9.6% drawdown; at 10% per trade it is 65%.
Is a stop loss the same as risk management?
No. A stop with the wrong position size behind it is just a bigger loss taken politely. The stop defines where you are wrong; the position size defines what being wrong costs. You need both, and the size has to be calculated from the stop, not the other way round.
Does opening several pairs reduce risk?
Often not. EUR/USD, GBP/USD and AUD/USD all move against the dollar, so three positions can be one bet wearing three hats. Count positions exposed to the same currency as one, and cap the total risk across all open trades.
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