Sorry for newbie question, but I tried to short several stocks, along the Timothy Sykes guidelines, and each time my orders were "disapproved" by the broker. I asked my broker, they mumbled something about NASDAQ threshold list, but these stocks are not on threshold list. Basically they said the only way to know whether a stock is shortable or not, is to send short order and hope it is not rejected. How do you do the shorting ? Which brokers are more "short-friendly" ?