Forex leverage lets you hold a currency position worth more than the money supporting it. Margin is the collateral required to keep that position open. The two describe the same funding relationship, but neither tells you how much a trade could lose.
A position requiring $200 of margin can lose more than $200. U.S. retail over the counter forex can also produce losses beyond the account deposit, not just the collateral assigned to one trade (CFTC advisory on retail forex risks).
The practical task is to separate three numbers: your position’s full value, its margin requirement and its potential loss. Confusing them makes a trade look cheaper than it is.
How forex leverage and margin work
A leverage ratio of 50:1 means $1 of required margin supports $50 of currency exposure. The corresponding margin rate is 2%. At 20:1, the margin rate is 5%.
For a straightforward percentage based margin calculation:
Required margin = position value × margin rate
Required margin = position value ÷ permitted leverage multiple
Use the same currency for the position value and margin calculation. If your account is in U.S. dollars, convert the exposure into dollars before applying the percentage.
A worked EUR/USD example
Suppose you buy €10,000 of EUR/USD at 1.1000. Your position has an initial dollar value of $11,000. With a 2% margin requirement, the required collateral is:
$11,000 × 0.02 = $220
You have $11,000 of market exposure, not a $220 investment whose loss stops at $220. The full position determines how much you gain or lose when the exchange rate changes.
If EUR/USD falls from 1.1000 to 1.0950, the position loses $50 before costs: €10,000 × $0.0050. Changing the margin requirement would not change that dollar loss while the position size and price movement stay the same. The guide to pips, lot sizes and position values covers the conversion from currency units to money per pip.
Margin is not a trading fee. Closing a position releases its margin requirement, but it does not refund trading losses. Your remaining equity still reflects the result and any charges.
Maximum leverage versus effective leverage
The maximum leverage available on an account is a ceiling, not a setting you must fully use. Effective leverage measures the exposure you actually hold relative to your current account equity.
Effective leverage = total gross position value ÷ account equity
For several positions, convert each notional value into the account currency and add their absolute values. This gross measure does not capture every currency offset or correlation, but it avoids hiding exposure by casually netting unrelated trades.
With $2,000 of equity and an $11,000 position, effective leverage is 5.5:1, even if the broker permits 50:1.
| Initial dollar exposure | Effective leverage | Required margin | Loss after a fall to 1.0950 |
|---|---|---|---|
| $11,000 | 5.5:1 | $220 | $50 |
| $22,000 | 11:1 | $440 | $100 |
| $55,000 | 27.5:1 | $1,100 | $250 |
These examples exclude trading costs. The same price movement produces losses equal to 2.5%, 5% and 12.5% of starting equity because the positions differ in size.
A higher permitted ratio reduces the collateral required for an unchanged position. It increases market risk when you use that extra capacity to hold more exposure. There is no automatic profit multiplier attached to the account label.
Effective leverage can also rise without another order. If losses reduce equity while substantial exposure remains open, that exposure becomes larger relative to the money supporting it.
Balance, equity, used margin and free margin
Your account balance alone cannot show whether open positions are approaching forced closure. Watch the figures that include their current gains and losses.
- Balance
- Deposits, withdrawals, realized trading results and posted charges, excluding floating gains and losses.
- Equity
- The account’s current value, including floating gains and losses and applicable adjustments.
- Used margin
- Collateral required for existing positions and, under some account arrangements, pending orders.
- Free margin
- Equity remaining after the used margin requirement.
- Margin level
- Equity expressed as a percentage of used margin.
For an account without credit or other adjustments:
Equity = balance + unrealized profit or loss
Free margin = equity − used margin
Margin level = equity ÷ used margin × 100
Platform calculations can include further adjustments. The MetaTrader 5 account calculations, for example, account for credit, commissions and blocked amounts where applicable.
Suppose your balance is $2,000, floating losses are $300 and used margin is $500. With no other adjustments, equity is $1,700, free margin is $1,200 and margin level is 340%.
Used margin is not subtracted from equity. It is subtracted when calculating free margin. Deducting it from both would count the collateral requirement twice.
Positive free margin is not a spending allowance or a safe amount to lose. It is the remaining capacity under the account’s margin calculation. Further losses, charges or higher requirements can consume it.
Margin calls and forced closeouts
A margin call concerns insufficient collateral. Depending on the account terms, it may involve a warning or a demand for more funds. A stop out, or margin closeout, is the broker closing positions because the account has breached its required threshold.
Do not assume a warning comes with time to arrange a deposit. Read the account’s intervention thresholds, calculation method and position closure rules before trading.
For UK retail CFD accounts, the regulatory closeout threshold is 50% of the margin required for open positions. This is an account level protection, not a rule that preserves half the original deposit (FCA policy statement on retail CFD protections).
What a 50% margin level means
Assume an account starts with $2,000 of equity and carries positions requiring $1,000 of margin. Its starting margin level is 200%.
If losses reach $1,500, equity falls to $500. Assuming the margin requirement remains unchanged:
$500 ÷ $1,000 × 100 = 50%
The account has lost 75% of its starting equity at that point. A further decline would breach a 50% closeout threshold. The percentage refers to required margin, not the amount originally deposited.
A closeout threshold is not a guaranteed execution price. Nor is an ordinary stop loss order: a market gap can cause execution beyond the intended level. This matters particularly when managing overnight and weekend risk.
Adding funds may restore the margin ratio, but it also puts more money behind the position. Reducing exposure addresses the size of the risk; depositing money alone does not.
What can reduce your margin buffer
An adverse exchange rate move is not the only way to lose free margin. Spreads, commissions and overnight financing charges affect equity too. A wider spread can increase a position’s floating loss even when the chart’s displayed midpoint barely moves.
Those costs relate to the trade and its exposure, not simply to the collateral reserved for it. A low margin requirement therefore does not make a large position inexpensive to maintain. Check the separate treatment of forex spreads, commissions and swap charges.
A change in the required margin rate can also reduce free margin without a trading loss. If the requirement on a $25,000 position rises from 2% to 4%, required margin doubles from $500 to $1,000. Check whether changes can affect existing positions, not just new orders.
Multiple trades deserve an account level check. Buying both EUR/USD and GBP/USD creates two positions with exposure against the dollar. Both can lose during dollar strength. Different pair names do not necessarily mean different risks.
Forex leverage limits and account protections
Available leverage depends on the product, currency, legal entity and client classification. A ratio advertised internationally may not be available to a U.S. retail customer.
United States
For U.S. NFA Forex Dealer Members, baseline minimum security deposits are 2% for transactions involving the designated major currencies and 5% for other transactions. These correspond to 50:1 and 20:1 before higher applicable requirements. Temporary increases are possible under extraordinary market conditions, and dealers may require more collateral than the minimum (NFA Financial Requirements Section 12).
Check the actual requirement for the pair rather than treating “up to 50:1” as a promise covering every instrument.
United Kingdom
For UK retail forex CFDs and rolling spot forex, the FCA framework sets maximum leverage of 30:1 for major currency pairs and 20:1 for minor pairs, with minimum margins of 3.33% and 5%. The framework also provides account level negative balance protection: liability for covered trading cannot exceed the funds dedicated to it in the account (FCA rules on retail margin and negative balance protection).
That protection does not prevent the loss of the account funds. Nor should you assume the same protection follows you to another jurisdiction or a different client category. Check the contracting entity and written terms rather than relying on a familiar brand name.
Choose position size before checking margin
Margin answers, “Will this account support the position?” Position sizing answers, “What loss would this exposure produce at the planned exit?” Start with the second question.
Consider an illustrative $5,000 account with a planned trade risk of $25, or 0.5% of equity. This percentage is an example, not a recommended level for every trader.
If the planned stop is 25 pips away, the position must be worth $1 per pip to produce a $25 loss at that price, before costs. On EUR/USD in a dollar account, that corresponds to €10,000.
At EUR/USD 1.1000, the initial exposure is $11,000. A 2% margin requirement would reserve $220. The planned price based loss is $25, while required collateral is $220. They measure different things.
To keep the intended loss budget at $25, allow for spread, commission and any relevant financing costs, reducing position size where needed. Slippage can still take the actual loss beyond the plan. The forex risk management and position sizing guide covers this calculation across trades and account exposure.
After sizing the position, check how its planned loss would affect account equity and margin level. Include other open trades in that check. If the account could face forced closure before your intended exit, reduce exposure or skip the trade rather than relying on a last minute deposit.
Before submitting a leveraged forex order
Confirm the provider’s legal entity and permissions through the appropriate official register. The process for checking a forex broker’s regulation should come before funding, not after a margin dispute.
For the order itself, verify:
- The full position value in your account currency.
- The required margin and remaining free margin after costs.
- The planned loss at your exit and the effect of a worse execution price.
- The account’s closeout threshold and whether requirements can change while you hold the position.
The useful number is not the largest position the platform will accept. It is the exposure your account can support through the losses and trading conditions you have planned for. Margin permission is not risk approval.