You can sub-penny stoploss on choice trade and the flat fee for penny trades is $5/trade. I've saved a ton by switching from share builder and scottrade.
FTR: I really wish I had held onto this and sold at 29 rrather than 17. bugger.
There is a stop limit when you go to sell....this insures when you when you cant be in front of the computer and if it drops to a certain point and you dont want to loose any more money it will sell for you at that point.