That's kind of like asking how long is a piece of string.
Some traders make a tonne of cash while some lose everything they invest.
Other traders only trade in a very conservative manner and make a small amount of profit every year.
Back when I was trading stocks I had great weeks and bad weeks. One week I lost 90% of my invested money, on another week I made a 60% gain.
It can be challenging. But once I learnt how to trade effectively I started making small amounts of profit consistently. And sometimes I just got lucky.
So yeah, how much you make will really depending on what sort of time you put in to your research, your knowledge, how much money you have to invest, and a little bit of luck.
As with anything, good research and a good strategy will pay off. And having a nice amount of cash to invest helps as well. Don't treat it like gambling. Treat it like investing. And definitely don't take stupid risks.
I think the best answer to this question would be a discouraging one.
They earn literal pennies on each dollar, tens of dollares invested per good transaction.
It's a game of Small gains and big losts.
Gains accumulate through time, and if you're patient and have talent for trading right stocks in right time, your gains might just outweight the loses.
This is a lovely question that need just straight forward answer, this is difficult to reply. It would resemble asking what complete a competitor make. I instruct individuals to exchange and have understudy who have never make a dime (don't adhere to guidelines) and I have understudy who make over $1,000,000 per year.
Not the appropriate response you needed but rather don't trust the untruths that are "out there" in this industry either.