How to Calculate Margin in Forex
Understanding Margin in Forex
Margin is not a cost but a security deposit held by the broker to cover potential losses. It allows you to control larger positions with less capital. For Bulgaria traders, margin is always calculated in the account’s base currency, typically USD.
The Margin Formula
Margin = (Contract Size × Lot Size) / Leverage. Contract size for standard lot = 100,000 units. For a mini lot = 10,000 units. Example: Trade 1 standard lot of EUR/USD with 1:100 leverage: (100,000 × 1) / 100 = $1,000 margin. If you trade 0.1 lots, margin = (100,000 × 0.1) / 100 = $100.
Margin Calculation for Different Currency Pairs
For pairs where USD is the quote currency (e.g., EUR/USD), margin is in USD directly. For pairs like USD/JPY, the margin is still in USD because the base currency is USD. For cross pairs (e.g., GBP/JPY), convert the notional value to USD first. Example: 1 lot GBP/JPY at 1.30 GBP/USD rate: notional = £100,000 × 1.30 = $130,000. Margin = $130,000 / 100 = $1,300.
Leverage and Margin Requirements
In Bulgaria, the local financial authority limits leverage for retail traders under ESMA rules: major pairs 1:30, non-major 1:20, indices 1:10. Offshore brokers may offer up to 1:500, but with higher risk. Always check your broker’s margin policy before trading.