How to Calculate Margin in Forex
What is Margin in Forex?
Margin is not a fee or transaction cost; it is a deposit held by the broker to cover potential losses. In Finland, retail traders are subject to ESMA leverage limits, which cap leverage at 30:1 for major currency pairs. This means you need at least 3.33% of the trade value as margin.
The Margin Formula
The basic formula is: Margin = (Trade Size in Units) / (Leverage). For example, if you want to trade 1 standard lot (100,000 units) of EUR/USD with 30:1 leverage, the margin is 100,000 / 30 = 3,333.33 USD. If your account uses USD, this is the amount required to open the trade.
Example for Finland Traders
Suppose you have a 10,000 USD account and want to trade EUR/USD with 30:1 leverage. The margin for 1 lot is 3,333.33 USD. Your used margin is 3,333.33 USD, and your free margin (available for new trades) is 10,000 - 3,333.33 = 6,666.67 USD. The margin level (equity / used margin * 100%) starts at 300% if no other trades are open.
Factors Affecting Margin
Leverage, trade size, and currency pair volatility all affect margin. In Finland, the local financial authority requires brokers to provide negative balance protection, meaning you cannot lose more than your deposit. However, margin calls can still occur if the market moves against you.