Quote from B1010:
A trader can be down $3000 in his account for a month. But the firm can be up on him $3000. If the trader took $3000 out of the market that month but his commissions are $6000. The trader will have to take another $3000 out of the market plus more commissions before he will be cut a check by the firm.
If traders up money in his account, the firms always up money. But trader can be down money in his account and firm still be up money.
Yes, this is it. Obviously results vary between people, but generally you are playing with a deck stacked against you.
Also for the people who are confused, if you are down GROSS regularly, the firm will boot you. If you are up GROSS regularly, but down NET, very often they'll hold onto you for as long as you can take it, especially if you're grossing a pretty consistent number. I've heard of a firm holding onto a guy with a $20,000 net debt because they could keep charging him something above .006 and he just kept churning for them.
Obviously the firm will not want you to talk to anyone else about their rates, or the firm's cost, because then that would spoil the fun, especially if you're one of their churn monkeys. Only firms like Genesis will say: how much vol you doing? Okay, here's a standard rate.