Understanding Currency Pairs: Majors, Minors and Exotics
Every forex quote is a relationship between two economies. Learn how pairs are quoted, why the majors dominate liquidity, and what changes when you trade minors and exotics.
Read moreAsk a professional risk manager what separates durable traders from the rest and the answer is rarely a secret indicator. It is position sizing: the decision about how much capital to commit to each idea. The entry determines whether a trade might work; the size determines whether you will still be trading after the ideas that do not.
What the 1% rule actually says
The 1% rule is a guideline that a trader should risk no more than 1% of account equity on any single trade. Crucially, "risk" does not mean the size of the position. It means the amount that will be lost if the trade reaches its stop-loss. A position can be large in notional terms and still risk only 1% of equity, provided the stop is placed sensibly and the size is calculated to match.
The exact figure is a matter of judgement — many conservative practitioners use 0.5%, and some active traders accept up to 2%. The principle is what matters: risk a small, fixed and pre-defined fraction of capital on every trade, so that no single outcome can do serious damage.
The arithmetic of losing streaks
Every strategy, however good, experiences runs of consecutive losses. The table below shows how much equity remains after ten losing trades in a row at different amounts of risk per trade.
| Risk per trade | Equity after 10 consecutive losses | Total drawdown |
|---|---|---|
| 0.5% | 95.1% | −4.9% |
| 1% | 90.4% | −9.6% |
| 2% | 81.7% | −18.3% |
| 5% | 59.9% | −40.1% |
| 10% | 34.9% | −65.1% |
At 1% per trade, ten straight losses leave the account down less than 10% — uncomfortable, but entirely recoverable. At 10% per trade, the same streak removes almost two-thirds of the capital.
Why drawdowns are asymmetric
Losses and recoveries are not symmetrical. After a loss, the smaller remaining balance must earn a larger percentage simply to return to where it started.
| Drawdown | Gain required to recover |
|---|---|
| −10% | +11.1% |
| −20% | +25.0% |
| −30% | +42.9% |
| −50% | +100.0% |
| −75% | +300.0% |
Capital preservation is not a defensive afterthought. It is the mathematical precondition for compounding.
How to calculate position size
Position sizing works backwards from the stop-loss. The stop should be placed where the trade idea is proven wrong — based on market structure or volatility — and the size is then chosen so that reaching that stop costs exactly the intended amount.
Position size (lots) = (Account equity × Risk %) ÷ (Stop distance in pips × Pip value per lot)
Worked example (illustrative)
- Account equity: US$50,000
- Risk per trade: 1% = US$500
- Pair: EUR/USD, where one pip on one standard lot (100,000 units) is worth US$10
- Stop-loss distance: 40 pips
- Position size = 500 ÷ (40 × 10) = 1.25 standard lots
If the same trader identified a trade that required an 80-pip stop, the correct size would halve to 0.625 lots. The monetary risk stays constant; only the position size changes. This is the essence of disciplined sizing — the market decides where the stop belongs, and the trader adjusts size to fit, never the other way round.
Adjusting for pip value
Pip value depends on the pair and on the currency of the account. For pairs where the US dollar is the quote currency, such as EUR/USD or GBP/USD, a pip on a standard lot is worth US$10. For pairs such as USD/JPY or EUR/GBP, pip value must be converted at the current exchange rate. Most trading platforms, including MetaTrader 5, display this automatically, but it is worth understanding the calculation before relying on it.
Beyond the single trade
Correlated exposure
Risking 1% on each of four trades is not the same as risking 1% four times independently if all four positions are, in effect, a bet against the US dollar. Long EUR/USD, long GBP/USD, long AUD/USD and short USD/CHF can all lose together. Sensible frameworks cap total risk across correlated positions as well as per trade.
Volatility and gaps
A stop-loss is an instruction, not a guarantee. In fast markets, around major announcements or over weekends, prices can move through a stop and fill at a worse price. Position sizing should allow for this by avoiding maximum size ahead of high-impact events.
Portfolio-level limits
- A maximum loss per day or week, after which trading pauses.
- A maximum aggregate exposure to any one currency.
- A drawdown threshold that triggers a formal review of strategy and sizing.
The quiet discipline that compounds
Position sizing is unglamorous. It will never feature in a headline about a spectacular trade. Yet it is the one element of trading entirely within the trader's control, and it is the element most responsible for long-term survival. Decide the risk before the trade, calculate the size from the stop, respect correlation and volatility — and accept that protecting capital is the foundation on which every other decision is built.
This article is published by OT PMC Research for general education and information only. It does not constitute investment advice, a recommendation or an offer to buy or sell any financial instrument, and it does not take account of your objectives, financial situation or needs. Figures labelled "illustrative" or "example" are hypothetical.