How to Calculate Margin in Forex
What is Margin in Forex?
Margin is not a fee or cost—it is a deposit held by the broker to cover potential losses. When you trade on leverage, the broker lends you money, and margin is your share. For example, with 1:100 leverage, you control $100,000 with only $1,000 margin. Margin is expressed as a percentage of the trade size. A 1% margin requirement means you need $1,000 for a $100,000 position.
The Margin Formula
The basic formula is: Margin = (Lot Size × Contract Size × Current Price) / Leverage. Lot size is typically 1 (standard lot = 100,000 units), 0.1 (mini lot = 10,000), or 0.01 (micro lot = 1,000). Contract size is usually 100,000 for standard lots. Current price is the market price of the currency pair. Leverage is the ratio provided by the broker.
Example for Serbia Traders
Suppose you trade EUR/USD at 1.1000 with a standard lot (100,000 units) and 1:50 leverage. Margin = (1 × 100,000 × 1.1000) / 50 = $2,200. If your account currency is USD, you need $2,200 available as margin. If you use 1:100 leverage, margin drops to $1,100. Always use the current price—price changes affect margin requirements.
Understanding Used Margin, Free Margin, and Margin Level
Used margin is the total margin locked by open positions. Free margin is the equity minus used margin—money available for new trades. Margin level = (Equity / Used Margin) × 100%. A margin level below 100% triggers a margin call; below 50% may cause stop out. For Serbia traders, monitoring these is crucial given market volatility.
How Leverage Impacts Margin
Higher leverage reduces margin requirements but increases risk. With 1:500 leverage, margin for the same trade is $220. However, a small price move can wipe out your account. The local financial authority in Serbia may restrict leverage to protect retail traders. Always choose a leverage that matches your risk tolerance.