Margin Call – A broker’s notification that account equity has fallen below the required margin level. If floating losses become too large (equity drops below a maintenance threshold), the broker issues a margin call. This often means the trader must deposit funds or reduce positions. If not remedied, positions may be forcibly closed. As BabyPips describes: “A Margin Call is when your broker notifies you that your Margin Level has fallen below the required minimum level”. It indicates that losses have approached the available margin.