Arbitrage Is Not Easy
I hate to be a cynic here but when you say even the worst traders could have made 300 - 400% this week I have to worry. The best traders on Wallstreet are happy to make 20 - 30% a year. They are considered gods if they do this. Then you are looking at a market that has more competition than any other in the world and expect to take 500 bucks into running a hedgefund with OPM. This is just plain nuts. At least with 500 bucks you won’t go broke if you bust your account.
Sorry but you are going to have to have A LOT of skill and enough luck to win every lottery in the US to do this.