As a market maker in listed securities, ill tell you the best way to do this. Dont use a market order. What if the specialist doesnt open the stock low enough. You're stuck buying a low print, but it might go lower. Instead, put a limit order down at a lower level. That way , if the specialist doesnt open it lower, you dont buy the stock. If he does open it lower, everyone participates on the opening print. Here is an example from Friday: EMC was indicating $10-$12 by the specialist, previous close was $12.70. I put down a ticket to buy at $10.50. The Stock opened at $10.30, and the next print was $10.80!! I made a quick 50 cents a share. This time he did open it lower, but maybe not next time. Hope this helps.