first we try to learn some theories and find some good strategies then apply this strategy on a demo account and practice. if you get good results then you can apply it to your real account but if you don't get good results then you may not use it on real accounts and bro if you are a beginner or beginner in this business then your first step is to use a demo account and on your demo account you learn about market strategies and many other things and here you prove your ability to trade directly