Margin is one of the most important ideas in leveraged currency trading, and one of the most misunderstood. It is not a fee and it is not a cost of the trade. It is money a provider sets aside from your balance while a position is open. This guide explains forex margin in plain terms, describes the kinds of figures a platform may display, and lists what to read in your own account agreement before you trade.
This article is general educational information, not financial, investment or legal advice. It draws on official and provider documentation rather than personal trading results, and no broker or strategy is endorsed. Disclosure: forexbrokers.net may earn a commission if you open an account through some links on this site; that does not change what we explain here. Forex trading can cause substantial losses.
What forex margin is
Margin is a deposit that supports an open leveraged position. US rules refer to it as a security deposit: the CFTC’s fact sheet on its retail forex rule describes minimum security deposit requirements for retail forex transactions, with a different minimum for major currencies than for others. The exact percentages are in that document and in your provider’s terms, and they can change, so read the current versions rather than relying on a figure quoted elsewhere.
The key point is that margin is not spent. While the position is open, the held amount supports that position. When the position closes, the held amount is released, and the balance then reflects whatever gain or loss the trade produced. Your account terms describe exactly how this works for you.
Margin and leverage are two sides of one idea
Leverage describes how large a position is compared with the deposit behind it. Margin describes the deposit itself. The two move together: a smaller margin requirement means higher leverage, and higher leverage means both gains and losses are larger relative to the money committed. ASIC’s Moneysmart forex guide explains the risks that leveraged currency trading creates for retail investors.
Regulators and margin rules
Some regulators set minimum margin requirements or maximum leverage for retail clients. In the US, those minimums sit in the CFTC rule described above. In Australia, ASIC’s media release on its CFD product intervention order describes leverage limits for retail clients that vary by the type of underlying asset.
Rules differ between countries and change over time, and a provider may apply stricter requirements than the regulatory minimum. So the only reliable figures for your account are the ones in the provider’s current documents for the entity that holds your account.
The margin figures on a platform
Platforms often show a small group of account figures. Names and formulas vary between platforms, so your platform’s own help pages are the authority on what each one means. The descriptions below are a general orientation only.
Balance
Balance usually refers to the money in the account before counting open positions.
Equity
Equity usually refers to the balance adjusted for the unrealised gain or loss on open positions.
Used margin
Used margin usually refers to the amount currently held against open positions.
Free margin
Free margin usually refers to equity that is not currently held as margin. It is the figure that tells you how much room you have to open new positions or absorb losses on existing ones.
Margin level
Some platforms also show a margin level that compares equity with used margin, often as a percentage. If your platform shows one, read how it is calculated and which thresholds your provider uses, because both are set in your account terms.
How to read a margin requirement in an instrument specification
Most platforms publish a specification page for each instrument. Find the line that states the margin requirement, and note how it is expressed: some providers quote a percentage of the position’s value, others a leverage ratio, and others a fixed amount per lot. Check whether the requirement changes with position size (tiered margin), whether it changes around weekends or scheduled news, and whether it differs between account types. If a specification shows a different figure from the order ticket, ask the provider which one applies before trading.
How forex margin can change during a trade
Margin figures are not a fixed snapshot. As prices move, the unrealised result on an open position changes, and so do the figures that depend on it. A position that looked comfortable when it opened can therefore look different later.
Watching how your platform’s figures change is how you notice that shift. If you do not understand why a figure moved, pause and read the platform’s definition before doing anything else.
Check whether positions share one pool
Find out from your provider whether open positions draw on the same equity. If they do, a loss on one position can affect the margin available for others. The account terms or the provider’s help pages should explain this.
Margin calls and close-outs
A provider’s terms may allow it to issue a margin call, close positions, or both, when margin falls to a set level. In Europe, the ESMA FAQ on its product intervention measures describes a margin close-out rule for retail CFD clients that applies at the account level.
The details matter. Read the level at which the provider acts, the order in which it closes positions, and what notice, if any, it gives. Do not assume you will have time to add funds; the agreement for your account is the document that settles this.
Can you lose more than your deposit?
That depends on the rules and the account. The same ESMA FAQ covers negative balance protection for retail clients under its measures. Other jurisdictions and providers may take a different approach, so read your account agreement to see what applies to you. Our guides in the broker safety section explain how to check those protections.
A practice routine, without numbers
You can practise reading margin before you risk money. Open the order ticket for a pair, enter a quantity, and look at any margin preview the platform shows before you send anything. Change the quantity and watch how the preview changes. Then compare it with the free margin figure.
Next, read the instrument specification for the same pair and find the stated margin requirement. If the platform’s preview and the specification disagree, ask the provider which one applies. This exercise teaches you where the numbers come from, rather than asking you to trust them.
Write down what you find
Keep a short note for each instrument: the margin requirement, the date you checked it, and any close-out terms you read. Terms can change, so the date matters. A note you wrote yourself is easier to rely on than a figure remembered from an article.
Forex margin checklist
- Find the entity that holds your account and its regulator.
- Read the margin requirement for each instrument you plan to trade.
- Find your platform’s definitions of equity, free margin and margin level.
- Read the margin call and close-out terms, including the order of closure.
- Check whether negative balance protection applies to your account.
- Preview the margin for a position in the order ticket before sending it.
Common margin misunderstandings
- Treating margin as a fee. It is a held deposit, not a charge.
- Assuming the requirement never changes. Check the current terms each time.
- Relying on general definitions. Your platform’s help pages define its own figures.
- Skipping the close-out terms. They decide what happens when margin runs low.
- Assuming protections apply everywhere. Read what your account agreement says.
Where forex margin fits in choosing a provider
Margin terms belong in any provider comparison alongside costs and safety. Record each provider’s requirements, close-out policy and balance protections in one place. Our fees and accounts guides show how to build that record.
Before opening any account, the CFTC’s advisory on things to know before trading forex recommends checking a firm’s registration and disciplinary history. In the US, the NFA’s investor resources include the BASIC database that holds that information for registered forex firms.
FAQ
Is margin the same as a trading cost?
No. Margin is a deposit held while a position is open. Costs such as spreads and commissions are separate.
What is free margin?
Generally, it refers to equity not currently held as margin. Check your platform’s definition for the exact formula.
Will my provider warn me before closing positions?
Not necessarily. Read the margin call and close-out terms in your account agreement.
Conclusion
Forex margin is a held deposit, not a cost, and the figures that describe it move with the market. Learn your platform’s definitions, read the margin requirement for each instrument you trade, understand the close-out terms before you need them, and confirm whether negative balance protection applies to your account. Those four habits turn margin from a surprise into a number you can plan around.
Risk warning: Forex and CFD trading uses leverage and can result in substantial losses. Past performance does not indicate future results. Nothing here is a recommendation to buy or sell any currency. If the implications are unclear, seek independent qualified advice.
