I am considering trading SMH, and I was hoping someone could give me some advice on what to expect. How do fills compare to QQQ? If I do begin trading it, immediate fills will be important. Are market orders relatively safe, or do I need to stick with limit orders? How is the liquidity, can you get a thousand shares filled easily? How about 10,000? I use IB, is there any way to use SMART without getting routed to AMEX? Any experiences or advice would be greatly appreciated. Thanks for any help.