Besides basic knowledge of the industry and keeping up with news, I would say, that the most important thing is having peace of mind. A trader never should be nervous or too excited, which usually leads to making mistakes. And, yeah, do I need to mention that the exchange itself should be super stable? Without any overloads and other annoying shit. For me, I found that tranquility on Basefex. To be frank, I was pretty skeptic at first, but in the end, it worked pretty well for me.