If you are short-term for a day or two, I still advise you not to do stocks. At least people who have been around me for such a short time have almost no good results. Be pragmatic and don't expect to get rich in the short term.

If you really want to invest in stocks, you can consider the following majors.

Finance major, or some colleges have more subdivided securities investment major.

If you really want to master this art, I suggest you study hard at school, including financial knowledge and macroeconomic knowledge.

There are many books on technology, but I still recommend you to read foreign classic technical analysis books, and don't take domestic technical analysis books as the starting object.

These books include: technical analysis of futures market, Japanese candle chart technology, candle chart interpretation and many other good books. Of course, learning is learning, using is using, and it is important to see how you apply what you have learned.