Forex risk management
The rules that keep a leveraged account alive long enough for a good strategy to pay off — including the trap that wrecks more FX traders than any bad call.
Risk management is the unglamorous half of forex and the half that decides whether you are still trading next year. None of it is complicated; all of it is easy to abandon in the moment, which is why it has to be written into the strategy rather than improvised on a fast pair.
Cap the loss on any one trade
Decide in advance the small, fixed share of your account a single trade may risk, and size every position to honour it. A strategy that risks the same modest amount each time can survive a long losing streak; one that bets big on its favourite pair cannot.
Respect the leverage trap
This is the forex-specific killer. Leverage lets a small account take a position large enough that an ordinary move wipes it out, and brokers offer far more of it than is survivable. Size from the loss you can absorb, not from the position the leverage allows - the available leverage is a ceiling, never a target.
Set a drawdown limit you will actually obey
Name the peak-to-trough loss at which you stop and review rather than push harder. A drawdown figure is the only number that tells you whether a strategy's returns were survivable; quoting returns without it is hiding the risk.
Count the cost of holding overnight
Carry a forex position past the daily rollover and you pay or receive a financing charge, and you expose the trade to news that breaks while you sleep. A plan that ignores rollover and gap risk is costing you money it never wrote down.
Let conviction guide weight within the cap
If your method grades its calls — as the systematic models here do, A through D — you can lean a little harder on the strongest setups and lighter on the weakest, all while staying under your per-trade cap. Grading does not replace the cap; it tells you where to lean inside it.
The cap, turned into a position size
Everything above is abstract until you do the arithmetic. Here is the per-trade cap worked into an actual size on its own illustrative numbers — deliberately different from the figures used elsewhere on this site, so what you take away is the method.
The arithmetic that turns a risk rule into a position size never changes; only the numbers do. Suppose a hypothetical account and a single rule: never risk more than a fixed slice of it on one trade.
- Account and per-trade cap. Account is
$20,000; the rule caps risk at1.5%of it per trade. That is$300you are willing to lose if the stop is hit — decided before the entry, not after. - Stop distance. The plan's stop sits
50 pipsfrom the entry — the level beyond which the idea is wrong. At an illustrative$1.00 per pip per unit, each unit of size risks50 × $1.00 = $50.00if stopped. - Position size falls out of the cap. Divide the cash you may risk by the risk per unit:
$300 ÷ $50.00 ≈ 6 units. The size is whatever keeps the loss at the cap — it is an output of the stop and the rule, never a number you reach for because the setup “feels” strong. - Widen the stop, shrink the size. Double the stop distance and the same cap buys you roughly half the units. The cap is the constant; the size bends to honour it. That single habit is what lets a strategy survive a losing streak long enough to be judged.
Where conviction comes in: a grade does not change the cap, it tells you where to lean inside it. If a method grades its calls A to D, you might size an A toward the top of your cap and a D toward the bottom — an A still risks no more than the rule allows, it just uses more of the room the rule gives you. Grading is a dial within the cap, never a licence to breach it.
How a conviction grade maps to size
The cap is a ceiling, not a target, which leaves room to vary size by conviction under it. A simple, honest scheme on an A-to-D scale: an A uses the full cap, a B around three-quarters, a C half, a D a token quarter or a pass. On the $20,000 account above with a 1.5% cap, that is roughly $300 of risk on an A, $225 on a B, $150 on a C. Every one of those still honours the cap — the grade only decides how much of the room the rule already gave you to use. A grade is a dial inside the cap; it is never permission to turn the cap up.
What bad forex risk management looks like
- Sizing from the leverage on offer. Treating a broker's maximum leverage as a target rather than a ceiling is the classic blow-up: it lets one ordinary move erase the account.
- A different bet size every trade. Going big on a favourite and small on a doubt has no statistical basis and guarantees your worst-sized trade is also your worst-judged one.
- Quoting returns with no drawdown. A return figure with no worst-case dip beside it hides the part that decides whether you could have survived the path. Always read the two together.
- Ignoring overnight cost. Carrying positions past rollover without accounting for the financing charge and gap risk is a slow leak no win rate compensates for.