In this case, the price moved in your favor. But, had the price declined instead, moving against your prediction, you could have made a loss. This continuous evaluation of price movements and resultant profit/loss happens daily. Accordingly, it leads to a net return (positive/negative) on your initial margin. In the loss scenario where your Free equity, (Equity – Margin) falls below the margin requirements (30000), the broker will issue a margin call. If you fail to deposit the money, and the market moves further against you, when your free equity reach the 50% of your initial margin the contract will be closed at the current market price, known as “stop out.”