the one below said the first situation.
but from what you said, it is probably the second type.
in that case, the so-called trader is what people usually call a trader (why is it called a trader? Because this profession is not as mysterious as most people think).
you don't need to develop customers, as long as you can make money from the market steadily.
is there a basic salary? Basically, there won't be, because the company depends entirely on the money you earn, so it also has to bear the loss.