There must be something wrong if you can until the margin call still happens. Whether it's the trading system, the traded instrument, or it can turn out to be wrong in understanding the knowledge being learned. There are so many factors that can be the reason why someone with enough knowledge, a profitable trading system, a good instrument can get a margin call. Therefore, in learning the forex market is not good in a hurry so that instead of understanding all the material that is studied carefully, it actually only becomes known but does not know and think deeply about the main purpose of the material being studied. Likewise with a trading system that actually has high profitability but is due to misunderstanding the basic main functions in the trading system so that in the end it makes the system become unproductive in generating profits so that there is a successive loss. Similarly, if it is not right to choose the appropriate pair, the trading system will automatically not work optimally. So, if you want to ask why you can call a margin, then the answer is to yourself, and the problem is to solve it, you have to do self-introspection where the error is.