How do you calculate the margin requirement?
Well, the required margin will be a percentage of the size of the trade that you want to open and is calculated according to the base currency of the pair that you want to trade. Using the equation below you can work out how much margin you’ll need for each trade.
Required Margin = Position Size X Margin Requirement
For example: You’d like to open a mini lot (10,000 base units) in USDJPY. How much margin do you need to open the position?
As the USD is the base currency, the position size (or notional value) is 10,000 USD. Your broker has given you a Margin Requirement of 5%.
Risk statement