When you open a leveraged forex position, your trading platform shows several numbers that can look confusing at first: Balance, Equity, Used Margin, Free Margin and Margin Level. Understanding the difference matters because these figures tell you how much of your account is committed to open trades and how much capacity remains for new positions or to absorb floating losses.
For Indian traders, the simplest way to remember the concept is this: Used Margin is the amount tied up to support your open positions, while Free Margin is the equity that remains available after that margin requirement is accounted for. The exact margin requirement, leverage, conversion method and close-out rules depend on the broker, platform and instrument.
Free Margin = Equity − Used Margin
What Is Margin in Forex Trading?
Margin is the amount of capital a broker requires you to commit as collateral when opening a leveraged position. You do not normally pay the full notional value of a leveraged forex position. Instead, a percentage of the exposure is reserved as margin.
For example, if a broker requires 2% margin on a $100,000 position, the required margin would be approximately $2,000 before any applicable currency conversion, spread effects or broker-specific calculations.
Margin is therefore not the same thing as a trading fee. It is better understood as capital allocated to support an open leveraged position. Brokers can also change margin requirements depending on the instrument, account type, position size, market conditions and their own risk rules.
IG explains that margin is the deposit required to open a leveraged position and that brokers may increase margin requirements when they expect higher volatility. OANDA likewise describes margin as collateral used to maintain open positions.
Used Margin vs Free Margin: The Simple Difference
| Term | Simple Meaning | Can You Use It for a New Trade? |
|---|---|---|
| Used Margin | Margin currently committed to open positions | Not normally available for another position |
| Free Margin | Equity remaining after used margin | Generally available, subject to broker rules |
| Equity | Balance plus or minus floating P/L | Forms the base for calculating available margin |
| Balance | Account value after closed trades and booked transactions | Not the same as available trading capacity |
| Margin Level | Equity relative to used margin | Helps indicate how heavily the account is leveraged |
What Is Used Margin?
Used Margin is the portion of your account equity that is currently committed to support open leveraged positions. Think of it as capital reserved by the broker rather than money that you can freely allocate to another trade.
The exact calculation varies. A simplified model is:
With 50:1 leverage, a simplified margin requirement is 2%. A $50,000 position would therefore require about $1,000 of margin. Actual broker calculations can involve the current price, account currency conversion, instrument-specific margin rates and tiered requirements.
What Is Free Margin?
Free Margin is the portion of your equity that is not currently committed as margin for open positions. It is commonly the amount that can support additional positions or absorb floating losses, subject to the broker’s rules.
The core formula is:
OANDA uses the same basic relationship in its account examples: equity minus margin gives the available/free margin. This means Free Margin can change continuously even when you do not open or close a trade, because floating profit and loss changes your equity.
Balance, Equity, Used Margin and Free Margin Example
Suppose an Indian trader has a forex account with a balance of $5,000. After opening one or more positions, the trades are showing a floating loss of $150.
| Account Metric | Example |
|---|---|
| Balance | $5,000 |
| Floating P/L | −$150 |
| Equity | $4,850 |
| Used Margin | $1,200 |
| Free Margin | $3,650 |
The calculation is:
Equity = $5,000 − $150 = $4,850
Free Margin = $4,850 − $1,200 = $3,650
So although the account balance still displays $5,000, the trader’s actual equity is $4,850 because of the floating loss. The amount available after the existing margin requirement is $3,650.
Why Free Margin Changes During an Open Trade
One of the most important points is that Free Margin is dynamic. It is not necessarily a fixed amount that remains unchanged after opening a trade.
If an open position moves into profit, equity can increase and Free Margin can rise. If the position moves into loss, equity falls and Free Margin can decline.
That is why watching only your balance can give you a false sense of security. Your balance may remain unchanged while an open position accumulates a significant floating loss.
What Is Margin Level?
Many forex platforms, including MetaTrader-style platforms, also display Margin Level. A commonly used formula is:
Using the example above:
Margin Level = ($4,850 ÷ $1,200) × 100 = 404.17%
A higher margin level generally indicates more equity relative to the margin committed to open trades. A falling margin level means the account is becoming more heavily stressed by losses, additional exposure or changing margin requirements.
However, do not assume that one universal margin-level percentage applies to every broker. Margin-call and forced-liquidation thresholds are broker-specific. OANDA, for example, documents its own margin close-out methodology, while other brokers can use different thresholds and terminology.
Free Margin vs Margin Level
| Free Margin | Margin Level |
|---|---|
| Shows remaining equity after used margin | Shows equity relative to used margin as a percentage |
| Formula: Equity − Used Margin | Formula: Equity ÷ Used Margin × 100 |
| Displayed as a currency amount | Displayed as a percentage |
| Useful for judging remaining account capacity | Useful for judging leverage pressure |
How Leverage Affects Used Margin
Leverage and margin are closely related. In a simplified example, 50:1 leverage corresponds to a 2% margin requirement, while 20:1 leverage corresponds to a 5% margin requirement.
| Leverage | Simplified Margin Requirement | Margin on $100,000 Exposure |
|---|---|---|
| 10:1 | 10% | $10,000 |
| 20:1 | 5% | $5,000 |
| 50:1 | 2% | $2,000 |
| 100:1 | 1% | $1,000 |
These are simplified illustrations, not universal broker rates. The actual margin requirement for a particular account and instrument must be checked with the broker.
Higher leverage can reduce the margin needed to control a given notional position, but it does not make the underlying market exposure safer. A small amount of capital can control a large position, meaning relatively small market moves can create significant gains or losses.
How Floating Losses Reduce Free Margin
Consider a trader with:
- Balance: $5,000
- Used Margin: $1,000
- Floating loss: $500
Equity becomes $4,500.
Free Margin becomes:
$4,500 − $1,000 = $3,500
If the floating loss grows to $2,000, equity becomes $3,000 and Free Margin falls to $2,000. The used margin may remain around $1,000 while the available cushion becomes much smaller.
This is why Free Margin should be treated as a risk-management metric rather than simply a number showing how many additional trades you can open.
Can Free Margin Become Negative?
Depending on the broker’s platform and calculation method, available or free margin can reach zero or become negative as equity falls relative to the margin requirement. The consequences depend on the broker’s margin rules.
Once an account becomes under-margined, the broker may restrict new trades, issue a margin warning or automatically close positions. Some brokers call this a margin close-out rather than a traditional margin call.
Never assume that a broker will allow your account to remain negative until you manually close a trade. Read the broker’s specific margin and liquidation policy before using significant leverage.
Free Margin vs Used Margin for Indian Forex Traders
Indian traders should also separate the concept of account margin from the question of whether a particular forex product or broker is permitted and appropriate for them.
Before funding an account, verify the broker’s regulatory status, the exact instrument being offered, the account jurisdiction, applicable Indian rules and the platform’s contract specifications. Do not assume that a broker offering a forex CFD or offshore leveraged product is automatically equivalent to trading permitted currency derivatives through a regulated Indian venue.
For Indian residents, it is particularly important to understand what the product actually is: spot FX, CFD, currency futures, currency options or another derivative can have materially different regulatory and operational characteristics.
Free Margin and XAU/USD
Gold traders often see the same margin concepts when trading XAU/USD. Gold can have different contract specifications and margin requirements from major forex pairs.
For example, a trader might have plenty of Free Margin while holding a small EUR/USD position but significantly less Free Margin after opening a larger XAU/USD position. The reason is that the broker’s required margin depends on the instrument, position size, price and applicable margin rate.
Do not compare lot sizes between EUR/USD and XAU/USD as though they represent the same exposure. Always check the contract size and margin requirement for the exact symbol on your platform.
What Happens When You Open Another Trade?
When you open an additional leveraged position, the broker generally reserves additional margin. This increases Used Margin and reduces Free Margin, assuming equity has not changed.
Example:
- Equity = $5,000
- Current Used Margin = $1,000
- Current Free Margin = $4,000
- New trade requires $750 margin
After opening the new trade, the simplified figures become:
- Used Margin = $1,750
- Free Margin = $3,250
The account has therefore used more of its available capacity even before considering whether the new trade starts winning or losing.
Why Opening Too Many Trades Is Dangerous
A trader can have a high account balance and still create excessive margin pressure by opening too many correlated positions.
For example, five separate USD-related positions may look like five independent trades, but they can all respond to the same macro catalyst. A strong US inflation release, Federal Reserve decision or Treasury-yield move can affect several positions simultaneously.
This can cause floating losses to accumulate quickly, reducing Equity and Free Margin together.
Free Margin Is Not Your Risk Per Trade
This distinction is extremely important.
Having $4,000 of Free Margin does not mean you should risk $4,000 on your next trade. Free Margin describes available account capacity under the platform’s margin calculation. It does not define a sensible stop-loss risk.
A better process is:
- Determine the maximum amount you are willing to lose on the trade.
- Choose the stop-loss distance.
- Calculate the appropriate position size.
- Check the required margin.
- Check the resulting Free Margin and Margin Level.
- Only then decide whether the trade fits the account.
How to Keep a Healthy Free-Margin Buffer
There is no universal Free Margin percentage that is safe for every strategy, broker or instrument. Instead, focus on maintaining enough capacity to absorb realistic adverse moves without approaching your broker’s margin-closeout threshold.
Useful practices include:
- Avoid using maximum available leverage simply because it is offered.
- Size positions according to stop-loss risk, not available margin.
- Monitor floating P/L during volatile news events.
- Understand how your broker calculates margin.
- Check whether margin requirements can increase during high-volatility periods.
- Avoid stacking highly correlated positions.
- Keep a meaningful cushion between your current Margin Level and the broker’s close-out threshold.
- Do not treat Free Margin as money that must be deployed.
Free Margin vs Used Margin: A Practical Checklist
| Question | What to Check |
|---|---|
| How much capital is committed? | Used Margin |
| How much capacity remains? | Free Margin |
| What is my real-time account value? | Equity |
| How much have I actually booked? | Balance |
| How leveraged is the account? | Margin Level |
| Could I survive another adverse move? | Free Margin + stress test |
| What happens near the limit? | Broker margin-call/close-out rules |
Common Mistakes Indian Traders Make
1. Looking Only at Balance
Balance does not include the current floating P/L in the same way Equity does. A large balance can coexist with a rapidly declining Free Margin.
2. Confusing Margin With a Fee
Margin is collateral or capital allocated to support leveraged exposure. It should not automatically be treated as a trading cost.
3. Using All Available Free Margin
Free Margin is available capacity, not a recommended position size. Using nearly all of it can leave little room for adverse price movement.
4. Ignoring Broker-Specific Rules
Margin requirements, leverage limits and close-out thresholds vary between brokers and instruments. Always read the account specification.
5. Assuming More Leverage Means Better Trading
Leverage can make a small account control a large position, but it also magnifies the effect of market movements on account equity.
Free Margin vs Used Margin: Final Takeaway
Used Margin is the capital currently committed to support your open leveraged positions. Free Margin is the equity left after accounting for that used margin.
The key relationship is:
For practical forex risk management, monitor Free Margin together with Equity, Used Margin and Margin Level. A trade can look affordable when judged only by the required margin, yet become dangerous if floating losses consume the account’s remaining cushion.
For Indian traders, the safest approach is to combine margin awareness with disciplined position sizing, predefined stop-losses, broker-specific margin rules and verification of the regulatory status of the product being traded.
Frequently Asked Questions
Is Free Margin the same as Balance?
No. Free Margin is generally calculated from Equity after subtracting Used Margin. Balance does not fully reflect floating profit or loss on open positions.
What is Used Margin in forex?
Used Margin is the amount of account collateral currently committed to maintain open leveraged positions.
What is Free Margin in forex?
Free Margin is the portion of Equity that remains after Used Margin is accounted for. It generally represents the capacity available for new positions or to absorb floating losses, subject to broker rules.
Does Free Margin increase when a trade makes profit?
Generally, yes. If an open position increases Equity through floating profit and the required margin does not increase proportionally, Free Margin can rise.
Does Free Margin decrease when a trade loses?
Generally, yes. A floating loss reduces Equity, which normally reduces Free Margin as well.
What is a good Margin Level?
There is no universal number that is safe for every broker or strategy. A higher Margin Level generally provides a larger cushion, but traders should compare their current level with their broker’s specific margin-call and close-out thresholds.
Can I open a trade when Free Margin is low?
Your platform may prevent a new trade when available margin is insufficient. Even if the platform allows it, opening another position with very little Free Margin can materially increase liquidation risk.
Is high leverage dangerous?
High leverage can increase the amount of exposure controlled with a given amount of capital. It can therefore increase the speed at which adverse market movements affect Equity and Free Margin.
Does XAU/USD use margin too?
Yes, leveraged XAU/USD trading can require margin. The exact requirement depends on the broker, contract specifications, position size, price and account conditions.
Risk disclosure: Forex and leveraged derivatives involve substantial risk. Margin requirements and liquidation rules differ by broker and instrument. This article is educational information, not personalized financial or investment advice. Verify the current terms and regulatory status of any trading service before depositing funds.
Sources for further reading: IG: What is margin?, OANDA: What is margin in trading?, and OANDA: Margin-related calculations and examples.
