MarginCall or MC actually many reasons. if indeed knowledge and insight are sufficient, it could be caused by an unstructured trading system and MM, or trading discipline. If it's a system problem and MM I think a trader who has a lot of knowledge and insight is not a difficult thing. But the problem of the attitude of traders who are not disciplined in trading systems and wise MM is what is difficult to solve and many traders fail. But it all comes down to the trader himself. If you want to succeed, you must be disciplined, if you are not disciplined, you will fail.