It represents the amount of funds that the trader must hold in his account in order to complete the planned trade. In essence, it is the security of an open trading position, which is blocked in the trading account until the position is closed. After closing the deal, these finances are unlocked again and can be manipulated arbitrarily. The maximum margin is limited by the type of financial instrument traded and the size of the leverage. In the event of a drop in capital below 50 percent of the collateral, the position is automatically closed.