When does a margin call and stop out occur?
A margin call occurs when your Margin Level falls below a 50%. This is a warning that your account equity is too low to maintain your current open positions and you require to deposit more funds or close some positions to avoid further action from stop out liquidation.
A stop out occurs when your Margin Level falls even further at 20%. At this point, system will start closing will close positions starting from the largest running loss until the margin level is restored to 20% and above to prevent further losses and protect your capital.