ARMFRisk management rules
The list of «risk management rules» passes from manual to manual almost unchanged: no more than so many percent per trade, so many instruments, a ratio of one to three. Some of them are correct, some correct with caveats, and some belong to portfolio investing and do not work on the currency market. We take them apart one by one.
The main risk management rules in trading: a breakdown of eight formulations
Below are the formulations as they are usually encountered, and a breakdown: what stands behind each one, under which conditions it holds and what to do with it in practice.
«Do not put more than half the capital into one asset»
The rule came from portfolio investing, where a position is held for years and its risk equals the size of the investment. On forex the size of the investment does not equal the risk at all: it is set by the stop and the size, not by the share of the account.
A meaningful analogue for the currency market: no more than 2–4 % of total risk across all open positions at once, taking their correlation into account.
«Two or three instruments are enough for a beginner»
Here the rule is sensible, but for a different reason from the one usually given. It is not about confusion in the calculations but about statistics: to understand whether a system works on an instrument you need dozens of trades on that instrument specifically.
Two or three pairs give a sufficient frequency of trades while allowing comparable statistics on each to be accumulated in a reasonable time.
«A maximum of five percent of the deposit in one operation»
The figure is too high for most systems. Six stops in a row at a share of winners of 45 % is an event with a probability of about 93 % over a distance of 200 trades; at 5 % risk such a streak takes away 26.5 % of the account.
A practical formulation: a risk such that a losing streak typical for your statistics does not push the account beyond a 20 % drawdown.
«No more than a quarter of the deposit under collateral»
The rule is about free funds, not about risk. It limits not the size of the loss but the closeness to a forced close of positions: the more margin is used, the smaller the buffer to the stop-out.
On forex with high leverage the margin for a sensible size rarely reaches 25 %, but the rule saves you from taking on many positions at once.
«More than seven instruments in a portfolio is confusing»
An upper limit is sensible, but the reason again is not confusion. It is correlation: eight currency pairs with the dollar are not eight independent positions but one bet on the dollar in eight guises.
A practical check: if the dollar stands on the same side in every open position, the total risk equals the sum of the risks rather than being «diversified».
«A protective order is always placed»
The only rule on the list that holds without caveats for margin trading. Without a stop the boundary of the loss is set not by the trader but by the broker's stop-out — at the market price and at the least convenient moment.
The only substantive caveat concerns the order type: protection comes from a stop-market, while a stop-limit may not fill in a fast market.
«The profit must be at least three times the risk»
The ratio by itself guarantees nothing: what matters is the product of the ratio and the win rate. A system with 1 : 1 and a win rate of 60 % is more profitable than one with 1 : 3 and a win rate of 25 %.
A requirement of 1 : 3 is useful as an entry filter at a stage when you have no statistics of your own yet: it stops you taking trades with an obviously cramped target.
«Trend positions get distant stops, trading ones close stops»
The formulation describes real practice: trades with different horizons have different stop distances. But it does not follow that the money risk should differ — the size is calculated so that the risk stays the same.
That is exactly what the size formula does: a distant stop gives a smaller lot, a close one a larger lot, and the loss at the stop is identical in both cases.
What is left after the check
Of the eight formulations, three work on the currency market in their original form. The rest require either a recalculation for margin trading or replacement with a verifiable condition.
| Rule | Verdict | The working formulation |
|---|---|---|
| 50 % in one asset | Not applicable | Total risk on open positions no higher than 2–4 % of the account |
| 2–3 instruments for a beginner | Works | As many as allow statistics on each to accumulate in a reasonable time |
| 5 % per trade | Too high | 0.5–2 % with a check against the maximum losing streak |
| 25 % under margin | Works | A limit on used margin for the sake of a buffer of free funds |
| 5–7 instruments | With a correction | Count independent bets rather than the number of pairs |
| A stop is mandatory | Works | A stop-market placed before the entry at the calculated level |
| A ratio of 1 : 3 | Partly | Positive expectancy: win rate × R/R − (1 − win rate) > 0 |
| Separate the types of positions | Works | Different stops at the same money risk |
The minimum set of rules worth writing down
Not a list of recommendations but specific numbers you substitute for yourself. Written down means existing; everything else is forgotten in the first tense situation.
The ticks are saved in the browser — this is a personal checklist, nothing is sent to a server.
A rule set for a forex account: a filled-in example
An abstract list turns into a working document when it holds your own numbers. Below is a filled-in example for an account of $5,000 and a system with a win rate around 45 % and a ratio of 1 : 2 — not a template to copy but a demonstration of how specific it needs to be.
| Rule | Value | Where it came from |
|---|---|---|
| Risk per trade | 1 % of equity, that is $50 right now | An expected streak of 8 losses gives a drawdown of 7.7 % — within the limit |
| Daily limit | 3 % of equity, that is three stops | Three trades in a row is the boundary beyond which decisions get worse |
| The weekly limit | 6 % of equity, then half size | Twice the daily one: a week with two bad days is not yet a reason to quit |
| The account drawdown limit | 20 %, the system goes for review | The recovery requires +25 %, that is about 64 trades — the limit of what is reasonable |
| Total risk | no more than 3 % across all open positions | Three independent trades at 1 % or two linked ones at 0.5 % |
| Review of the rules | every 50 trades | By that point the statistics change noticeably |
A useful property of such a table: any number in it is checked by calculation rather than by opinion. A rule that cannot be justified will not survive the first losing streak — it will be broken exactly when it is needed.
Frequently asked questions
What counts as correct risk management in trading?
The kind where three numbers are known in advance: how much the account loses on one trade, after what loss the trading day ends and at what drawdown the system goes for review. Everything else is detail derived from these three.
Which risk management rules are genuinely mandatory?
Three: a risk per trade set in advance, a stop order at the calculated level and a limit after which trading stops. Everything else is refinement. Without these three any system sooner or later arrives at a trade whose loss is decided by emotion.
Do the 1 % rule and the 5 % rule contradict each other?
They describe different situations. One percent is a reference for a system you have no statistics on yet. Five percent appears in sources as an upper bound for an experienced trader who knows the length of their losing streaks, but even there it is a limit rather than a working value.
Can your own rules be broken if the situation is exceptional?
Exceptional situations happen on the market regularly — that is the problem. The practical approach: if an exception is needed often, the rule is formulated wrongly and has to be rewritten between trading sessions rather than at the moment of a trade.
How do you check that the rules work?
By the journal: the actual loss on closed trades has to match the calculated one, and the maximum drawdown must not exceed the set limit. A discrepancy means the stop was moved somewhere or the size was not calculated by the formula.
Which rules are specific to forex?
Three. The first is the limit on used margin, because leverage allows a size incompatible with the account. The second is the rule for linked pairs: positions with the same currency on the same side count as one bet. The third is accounting for the swap on trades carried overnight.
Does the «no more than 5–7 instruments» rule apply to currency pairs?
With a correction: what has to be counted is not pairs but independent bets. Seven pairs with the dollar are one dollar position in seven guises, and the risk on it adds up. The practical reference is two to four independent trades at once.
Is a rule about trading hours needed?
It is useful. A round-the-clock market allows trading at any time, but the spread and the character of the moves differ between sessions. A restriction by hours removes a whole class of trades where the stop is taken out by a widened spread rather than by a price move.
How do the rules change when moving to a larger deposit?
The percentages stay, the absolute amounts and the available choice of instruments change: a larger account allows long stops where the size used to run into the minimum lot. There is no reason to revise the risk percentage as the account grows — it is derived from the length of losing streaks, not from the size of the deposit.
What to do if the rules contradict the strategy?
Take the specific contradiction apart. Usually it means the strategy requires either a longer stop than the deposit allows or more simultaneous positions than fit into the total risk limit. Both cases are solved by the size of the account or the choice of instruments, not by cancelling the rules.
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