GUIDE
Forex risk management, with measured numbers
Everyone tells you to risk 1-2% and use a stop loss. Almost nobody tells you what those numbers have to survive. We measured it on gold.
Short answer
Risk management is three decisions: how much of the balance a single trade may lose, how far the stop sits from entry, and what total drawdown you will accept before stopping. The first two set position size. The third is the one people skip, and it is the one that ends accounts.
Three decisions, not a list of rules
| Decision | Sets | Usual mistake |
|---|---|---|
| Risk per trade | How much one loss costs | Varying it by how confident you feel |
| Stop distance | Where the idea is wrong | Placing it where the loss feels tolerable |
| Maximum drawdown | When you stop | Never deciding, so it becomes whenever you panic |
The first two together determine position size, and calculators handle them. The third is the one that gets skipped, and it is the one that decides whether an account survives a bad month.
What the numbers actually have to survive
Generic advice is easy to give because it costs nothing to state. The harder question — how big a move does a limit have to absorb — needs measurement, so here is ours on gold across a year of five-minute data.
| Measured on XAUUSD | Figure |
|---|---|
| Sessions closing below the running high | 84.5% of 258 |
| Median retracement from that peak | 9.47% |
| Deepest retracement | 28.49% |
| Losing streaks in a year | 61 |
| Longest run of down days | 9 consecutive |
| Cost of the worst 3-day run vs the 9-day run | 98% |
Two of those change how a limit should be set. Gold spends most of its life below its own peak, which makes any rule anchored to a peak live almost permanently — the argument in full is under trailing drawdown. And duration does not predict damage: a three-day run cost almost exactly what a nine-day run did, measured in the losing streak study.
Position sizing, done properly
- Fix the percentage before the trade, not while looking at the chart.
- Place the stop where the idea is wrong, then size to it. Reversing that order — choosing a stop that makes the loss feel acceptable — is how people end up with stops inside the noise.
- Check the minimum lot does not override you. On a small gold account it frequently does, and the position ends up several times larger than the percentage you set. Leverage explained covers why that happens.
- Decide the stopping point in advance. A daily loss limit and a maximum drawdown, written down, before the day you need them.
The part that is not arithmetic
A profitable system loses money over short windows far more often than people expect. We simulated it: a strategy with a genuine positive edge still finishes underwater about a third of the time after 42 trades, and it takes roughly 416 trades before a track record proves anything.
Which means most decisions to abandon a system are reactions to noise. The discipline that matters is not tightening risk after a bad week — it is having chosen a size you can hold through one. That is a rule you set once, when nothing is happening, and then leave alone.
If you want the arithmetic done for you, the gold lot size calculator and the prop firm drawdown calculator cover sizing and limits respectively.
Common questions
How much should I risk per trade in forex?
One to two per cent of account balance is the conventional range and it is a reasonable default. What matters more than the exact figure is that it is fixed and applied consistently. A trader risking a steady 2% survives losing runs that destroy someone varying between 1% and 10% by feel, even if the second trader averages less. Consistency is doing more work than the number.
What is a good drawdown limit?
That depends on what you are trading, which is why generic answers are unhelpful. We measured gold against a running high and found it spent 84.5% of sessions below its own peak, with the deepest retracement reaching 28%. A limit set without knowing figures like those for your instrument is a number chosen because it sounded prudent.
Should I use a fixed lot size or percentage risk?
Percentage, in almost every case, because it scales both ways — positions shrink after losses and grow after gains, which is the opposite of what most people do manually. The exception is a small account, where the broker minimum lot can already exceed your intended percentage. At that point you are on fixed sizing whether you chose it or not, and the honest fix is a larger balance rather than a smaller percentage.
How do I know if my losing streak is normal?
Compare it against the base rate rather than against your expectations. We measured 61 losing streaks on gold in a year, with a longest run of 9 consecutive down days, and found that a three-day run cost 98% of what the nine-day run did. Duration is a poor guide to damage. If your system has not yet had a bad run, the useful assumption is that it is still coming.
Further reading
Educational information only, not financial advice. Trading leveraged products carries substantial risk of loss. Last updated 2026-08-19.