Risk management
Leverage and Margin in Forex: How They Actually Work
Leverage and margin in forex explained: margin as a deposit, notional value, ESMA leverage caps, margin level, margin calls, stop-outs and effective leverage.
Leverage lets you control a position much larger than the cash in your account. Margin is the slice of your equity the broker sets aside while that position is open. The two are often discussed as if they were risk measures. They are not. Margin decides how large a position you are allowed to open and how far it can move against you before the broker closes it. Your stop and your position size decide how much you can lose.
Margin is a deposit, not a cost
When you open a trade, the broker reserves part of your equity as collateral. That reserved amount is used margin. It is not spent and it is not a fee. When the trade closes, the margin is released and only the profit or loss, plus costs such as spread, commission and swap, changes your balance.
The rest of your equity is free margin, available for new positions or to absorb floating losses on existing ones.
Notional value and the margin formula
Every forex position has a notional value: the full amount of currency you are exposed to. One standard lot of EUR/USD is €100,000. At an exchange rate of 1.1000, that is $110,000 of exposure.
Required margin = Notional value ÷ Leverage, or equivalently notional value × margin rate.
At 30:1 leverage, the margin rate is 1/30, or 3.33%. One lot of EUR/USD at 1.1000 needs $110,000 ÷ 30 = $3,666.67 of margin in a USD account. At 20:1, the same lot needs $5,500.
If your account currency differs from the base currency, the broker converts the notional into your account currency at the current rate. The margin calculator does that conversion and shows required margin, margin level and effective leverage for common pairs.
Regulatory leverage caps in the EU
In March 2018 the European Securities and Markets Authority (ESMA) agreed product intervention measures for contracts for difference (CFDs), including currency-pair CFDs, offered to retail clients. The measures began as temporary ESMA interventions and were later adopted as permanent national measures by regulators across the EU. The leverage caps on opening a position are:
| Underlying | Maximum leverage | Initial margin |
|---|---|---|
| Major currency pairs (any two of USD, EUR, JPY, GBP, CAD, CHF) | 30:1 | 3.33% |
| Non-major currency pairs, gold and major equity indices | 20:1 | 5% |
| Commodities other than gold, non-major equity indices | 10:1 | 10% |
| Individual equities and other reference values | 5:1 | 20% |
| Cryptocurrencies | 2:1 | 50% |
ESMA's list of major indices is the FTSE 100, CAC 40, DAX 30, Dow Jones Industrial Average, S&P 500, NASDAQ Composite, NASDAQ 100, Nikkei 225, ASX 200 and EURO STOXX 50.
The same measures require a margin close-out rule on a per-account basis: the provider must close one or more positions when equity falls to 50% of the total initial margin required for open positions. They also require negative balance protection, which caps a retail client's losses at the money in the account.
Other jurisdictions set different caps, and professional clients in the EU are treated differently. Brokers may also offer lower leverage than the regulatory maximum.
Margin level, margin call and stop-out
Trading platforms track the health of an account with the margin level:
Margin level = Equity ÷ Used margin × 100%
Equity is balance plus floating profit or loss. As open trades lose money, equity falls and the margin level falls with it.
Brokers set two thresholds. At the margin call level, the platform warns you and usually blocks new positions. At the stop-out level, the platform starts closing positions, often beginning with the largest loser, until the margin level recovers. For EU retail CFD accounts, the stop-out cannot be lower than the 50% close-out level above. Outside that rule, both thresholds are set by the broker and stated in its terms.
Worked example
- Equity: $10,000, no open trades
- Open 1 lot of EUR/USD at 1.1000 with 30:1 leverage
- Used margin: $3,666.67. Free margin: $6,333.33
- Margin level: $10,000 ÷ $3,666.67 = 272.7%
A 50% close-out triggers when equity falls to $1,833.33, a loss of $8,166.67. At $10 per pip on one lot, that takes an adverse move of about 817 pips.
Now compare that with a trader who risks 1% per trade. On the same account, 1% is $100, which on one lot is a 10-pip stop. The margin system would let this position run more than 80 times further than the trader's own risk plan allows. Margin tells you when the broker steps in, which is far too late to be a risk control.
Effective leverage
The leverage setting on your account is a ceiling. Effective leverage is what you are actually using:
Effective leverage = Total notional value of open positions ÷ Equity
Suppose the $10,000 account holds 1 lot of EUR/USD ($110,000 notional) and 0.5 lots of USD/JPY ($50,000 notional, since the base currency is already dollars). Total notional is $160,000, so effective leverage is 16:1.
Effective leverage is a better gauge of exposure than margin level, because it tells you how much a 1% move in the underlying markets changes your equity. At 16:1, a 1% adverse move across all positions costs about 16% of equity. That number is worth tracking alongside the open risk to your stops.
Why margin is not risk
Two traders can hold identical positions with the same margin and face very different risks. One has a 20-pip stop on 1 lot, risking $200. The other has no stop and is relying on the stop-out. Margin is the same in both cases. The possible loss is not.
Work in this order. Decide the risk amount, size the position from the stop using the position sizing method, and only then check that the margin required fits comfortably within free margin. If margin is the binding constraint on your size, the position is probably too large for the account. Pip values feed into both calculations, so the guide to pips is worth reading first if any of the conversions above were unfamiliar. Leveraged trading can lose money quickly; negative balance protection stops the balance going below zero, not the losses on the way there.
Key points
- Margin is collateral held while a position is open; it is released when the trade closes.
- Required margin equals notional value divided by leverage; at 30:1 one lot of EUR/USD at 1.1000 needs $3,666.67.
- ESMA caps retail CFD leverage at 30:1 for major pairs and 20:1 for non-major pairs, gold and major indices, with a 50% margin close-out.
- Margin level is equity divided by used margin; stop-out levels are a last resort, not a risk plan.
- Track effective leverage and set risk with stops and position size, then check that margin fits.