Margin is the collateral you deposit with your broker in order to open up leveraged positions.
The amount of margin in your account and the amount of leverage your broker offers will determine how much your broker will lend to you and the size of positions you can open. It’s important to understand that margin is not a cost or fee, once you close your leveraged trading position, your margin is returned to you, adjusted for any profits or losses, and can be freely withdrawn.
This margin deposit just ensures you have enough capital reserved to cover your losses if your leveraged trade moves against you. As the forex market isn’t very volatile, margin trading is essentially the only way you can turn a reasonable profit, so it’s important to understand how margin works before diving into your trading journey.