There are many resources that can give you a better 'comparison study' of online brokerage houses than GFY folks.
What are you looking exactly? Low commissions, fast execution, options trading, what??
1. The average to open an account is usually $2000.00
2. Buy/Sell orders happen pretty fast but are determined by the market
3. Commissions for buy/sale market orders are in the $15 range. Options commissions are usually in the $25 range.
4. You'll need to sign a document if you want to trade options (calls/puts)
5. You'll have to fill out an app to open a margin account
Not sure what you wanted to know exactly so I'm not sure if anything I've said will help you out or not. Try asking the folks at
http://www.RagingBull.com, they'll be more than happy to help you out.