I have read so many types of theory and even read more about investment rules. but it is still only words and a theory.
In order to become a good trader, we not only need to read, we need to practice to test whether our transactions are right or wrong.
From there we will have experience and we will do a lot better than those who only read books.
You know that it is much easier to advise everyone theoretically, even those that are failure themselves, and very easy to perfect everything in our head than to fully practicalise it, it is when we turn whatever we have read, studied and thought in our mind into practical that we can fully approve ourselves to be worthy of trading our being a perfect trader.
Practice really makes perfect, and this is what we really need to engage ourselves more on like you said, before going into live trading if we really want to be successful in our day trading and not only day trading alone, also in other methods of trading. We need to develop the right strategy that we will get use to for a smooth trading and it is indeed only through practicing we can achieve this.