hedge fund and pro firm are two completely different things.
hedge fund = put up nothing, get $100 million from investors, make 1-2% mgmt fee = $2million a year and then a 20-30% performance bonus = $4 million if you're good. trade futures, commodities, currencies, equities, intl' markets.
pro firm = put up money and mostly daytrade nyse stocks. occasionally hold overnight + swing until get pressured to close your position. structure of pro firm coerces traders to book quick profits since firm's bottom line comes from trader's booking (commission), and not the trader profitability. also, lose money, put up more of your money.
most pro firms don't even have $20million in capitalization yet they give leverage to 200+ traders.