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The Relationship Between Used Margin and Free Margin
While Used Margin represents the funds tied up in maintaining open trades, Free Margin is the remaining balance available for opening new positions or absorbing losses.
- Used Margin = Total margin required for all active trades.
- Free Margin = Account Equity – Used Margin.
A rise in Used Margin directly reduces Free Margin, limiting a trader’s ability to take new positions. Conversely, closing trades releases Used Margin, increasing Free Margin.
How to Calculate Used Margin
The formula for Used Margin is straightforward:
Used Margin = Total Required Margin for All Open Trades
Brokers determine the required margin based on trade size and leverage. For example:
- If trading 1 mini lot (10,000 units) of EUR/USD with 1:20 leverage, the required margin is:
Required Margin = (10,000 × 5%) = $500 - Opening three such trades means:
Used Margin = 500 × 3 = $1,500
This leaves only $500 as Free Margin if the account balance is $2,000.
The Impact of Used Margin on Margin Calls and Stop-Outs
Margin Call Scenario
A Margin Call occurs when Margin Level (Equity / Used Margin × 100%) drops to 100%, signaling that the account can no longer sustain further losses without intervention.
Example:
- Equity = $1,500 (due to losses)
- Used Margin = $1,500
- Margin Level = (1,500 / 1,500) × 100% = 100% → Margin Call triggered
Stop-Out Scenario
A Stop-Out happens when the Margin Level falls below a broker’s threshold (often 50%), forcing automatic position closures to prevent further losses.
Example:
- Equity drops to $750
- Used Margin remains $1,500
- Margin Level = (750 / 1,500) × 100% = 50% → Stop-Out activated
Key Takeaways on Used Margin Management
- Used Margin is critical for maintaining open trades but must be monitored to avoid excessive risk.
- A high Used Margin reduces Free Margin, limiting new trade opportunities.
- Traders must maintain sufficient Margin Level to prevent forced liquidations.
By understanding Used Margin, traders can optimize position sizing, leverage, and risk management effectively.
Conclusion
Used Margin plays a crucial role in forex trading by securing open positions. Traders must balance Used Margin and Free Margin to maintain flexibility and avoid forced closures. Proper risk management ensures long-term success in volatile markets.