Should your equity fall below the maintenance margin amount, Plus500 will make a Margin Call and close any/all open positions. It is your responsibility to monitor your open position(s) at all times and ensure that you have sufficient funds on your account or take a decision to close any or all of your open position(s).
CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. 72% of retail investor accounts lose money when trading CFDs with this provider. You should consider whether you understand how CFDs work and whether you can afford to take the high risk of losing your money.