no,. but you have to believe these guys will try to show the day opened up lower for a split second and then popped to the OPEN you are talking about, your trade executes and you are left wondering how could this happen..... or, better yet, there are too many shares at your limit order area, and these will get filled first, then if there is any left for you, you are good, but is not, then it drops, with you again wondering why....or even better, is the stock opens with a ask above you GTC price, but the bid is 50% lower(below your limit order price) and you do not get the sell.....too many scenarios here, and even ones not mentioned, ....remember, in pinkies land, MM's control the prices and what gets bought and sold, not a lot of regulation here or much you can do about it......