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Used Margin vs Free Margin: A Trader's Guide

Oct 21, 2026

In Forex trading, understanding the concepts of used margin and free margin is fundamental for effective risk management and successful trade execution. These two terms describe different aspects of your trading account's equity, directly impacting your ability to open new positions and withstand market fluctuations. While both relate to the capital held for trading, they represent distinct states of that capital.

What is Used Margin?

Used margin, also known as 'locked margin' or 'initial margin', is the portion of your trading account's equity that is actively reserved by your broker to keep your open positions running. When you open a trade, a certain amount of capital is set aside as a guarantee against potential losses for that specific position. This amount is not available for other purposes until the position is closed.

The amount of used margin depends on several factors:

  • Instrument: Different currency pairs or assets may have varying margin requirements.
  • Position Size: Larger trade volumes require more used margin.
  • Leverage: Higher leverage allows you to control a larger position with less used margin, but it also amplifies both potential gains and losses. Leverage sizes at RannForex are set in accordance with counterparty leverages, with a maximum of 1:100 one hour before market close on Friday for all account types.

What is Free Margin?

Free margin, sometimes called 'available margin' or 'usable margin', represents the remaining equity in your trading account that is not currently tied up by open positions. This is the capital you have available to open new trades, absorb losses from existing positions, or withdraw. It is a dynamic figure that constantly changes with the profitability or loss of your open trades.

Free margin is calculated as: Equity - Used Margin.

For example, if your account equity is $1,000 and you have $200 in used margin for open positions, your free margin would be $800. This $800 is what you can use for new trades.

The Relationship Between Used Margin and Free Margin

Used margin and free margin are two sides of the same coin, both derived from your account's total equity. Your equity is the sum of your account balance plus or minus any floating (unrealized) profits or losses from your open positions. As your open positions fluctuate in value, your equity changes, which in turn affects your free margin.

  • As open positions become profitable: Your equity increases, leading to an increase in free margin (assuming used margin remains constant).
  • As open positions incur losses: Your equity decreases, leading to a reduction in free margin.
  • Opening a new position: Increases used margin and decreases free margin.
  • Closing an existing position: Decreases used margin and increases free margin.

Understanding this relationship is vital for managing your trading activity and avoiding unnecessary risks. For a deeper dive into how these figures are calculated, you can explore resources on how Forex margin is calculated.

Why Understanding Both is Crucial for Traders

A clear grasp of used margin and free margin is essential for maintaining control over your trading account and making informed decisions.

Margin Call Implications

One of the most critical aspects of free margin is its role in preventing a margin call. A margin call occurs when your account's equity falls below a certain percentage of the used margin, meaning your free margin is insufficient to cover potential further losses. At RannForex, the Company has the right to close any position if the margin level on the trading account falls below 60%. Traders are obligated to maintain a margin level of no lower than 100%.

When a margin call is triggered, your broker may automatically close some or all of your open positions to prevent further losses and bring your account back to an acceptable margin level. This can happen if market movements go significantly against your open trades, depleting your free margin.

Order Execution Considerations

Your free margin directly determines your capacity to open new positions. If you do not have sufficient free margin, your broker will reject new orders. RannForex, for instance, has the right to reject any order to open a position if there is not enough free margin on the trading account. This applies to both instant and pending orders, as the free margin calculation is performed at the moment of execution, not activation, and can differ from what a client expects.

Therefore, monitoring your free margin is key to planning your trades and ensuring you have the necessary capital to execute your desired strategies.

Conclusion

Used margin and free margin are critical components of Forex trading. Used margin is the capital tied to your open positions, while free margin is the capital available for new trades or to absorb losses. Keeping a close eye on your free margin is vital for avoiding margin calls and ensuring you have the capacity to open new positions. Traders must actively manage these figures to maintain a healthy trading account and implement effective risk management strategies.

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