How to Calculate Margin in Forex
What Is Forex Margin?
Forex margin is a deposit required by your broker to open and maintain a position. It is not a fee but a portion of your account equity set aside. For Saudi Arabia traders, margin is often expressed in SAR, though most brokers display it in USD. The CMA Saudi requires brokers to clearly state margin requirements in their account terms.
The Margin Formula Explained
The basic formula is: Margin = (Lot Size × Contract Size × Current Price) / Leverage. For example, if you trade 1 standard lot (100,000 units) of EUR/USD at 1.1000 with 1:100 leverage, the margin is (100,000 × 1.1000) / 100 = $1,100. In SAR, this equals 1,100 × 3.75 = 4,125 SAR. For mini lots (0.1 lot), margin is 412.50 SAR.
Leverage and Margin in Saudi Context
Many brokers offer leverage up to 1:500 for Saudi traders, especially on Islamic accounts. Higher leverage means lower margin, but also higher risk. For instance, with 1:500 leverage on a 0.1 lot EUR/USD trade, margin drops to 82.50 SAR. The CMA Saudi advises using leverage cautiously and only trading with risk capital.
Margin Calculation Example with SAR
Suppose you open a 0.5 lot GBP/USD trade at 1.2500 with 1:200 leverage. Margin = (50,000 × 1.2500) / 200 = $312.50. In SAR: 312.50 × 3.75 = 1,171.88 SAR. Your broker will deduct this from your account balance. Always use a margin calculator provided by your broker to avoid errors.
Margin Level and Margin Call
Margin level is (Equity / Used Margin) × 100%. If it falls below 100%, you get a margin call. In Saudi Arabia, CMA-regulated brokers set margin call levels between 50% and 100%. For example, if your equity is 2,000 SAR and used margin is 1,500 SAR, margin level is 133%. If it drops to 90%, you must add funds or close positions.