How to Calculate Margin in Forex
What is Margin in Forex?
Margin is essentially a good-faith deposit that your broker holds to cover potential losses. It is not a fee or transaction cost – it is part of your equity that is set aside. For Norway traders, margin is always calculated in the account currency, which is USD for this guide. The local financial authority requires brokers to clearly display margin requirements for each trade.
The Margin Calculation Formula
The standard formula is: Required 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 100,000 for standard forex pairs. Current price is the market price of the currency pair. Leverage is the multiplier provided by your broker, up to 1:30 for retail traders in Norway.
Example for a Norway Trader
Suppose you want to buy 1 standard lot of EUR/USD at 1.1000 with 1:30 leverage. Your margin = (1 × 100,000 × 1.1000) / 30 = 3,666.67 USD. If you deposit 10,000 USD via Bank Transfer, your free margin is 10,000 – 3,666.67 = 6,333.33 USD. This free margin can be used for additional trades or to absorb losses. Always calculate margin before entering a trade to avoid overleveraging.
Margin Level and Margin Call
Margin level is calculated as (Equity / Used Margin) × 100%. If your equity drops and margin level falls below the broker's requirement (often 100%), you get a margin call. For Norway traders, it is critical to monitor margin levels because the local financial authority mandates brokers to enforce strict liquidation policies. Use stop-loss orders and avoid using your entire balance as margin.