Margin call is triggered when the percentage of an investor’s equity in a margin account falls below the required amount (120%). This means that if the value of your open positions decreases and your equity falls below the minimum maintenance requirement, your broker may issue a margin call. This is a demand for you to deposit additional funds into your account to bring your equity back up to the required level. It’s important to monitor your margin levels and ensure that you have sufficient funds in your account to avoid a margin call.