Margin call is the warning that the trader is about to lose his deposited amount and to continue his trades, he would need to add fund into his trading account.
The different account with different margin call level helps you to decide which account to choose according to your trading requirements. If you don’t want to enter any Stop losses and you are a careless trader, then you would require high margin call level. On the other hand, if you enter stop losses and are sure about your trades, you would require low margin call. So, there are no obstacles in your trading style.