it is a pre-market, I have 1000shares of stock. I did not check the bid/ask carefully, hid the bid (actually 1point lower than my entry), thought it is a close price, but a huge mistake, I feel kind of odd, when I write the order and it was sold. later realized I sold with the bid! and I give the market 1k bucks! watch out, here is the one, did you see 0.0520 similar to 0.52, if you did not pay attention! so I have a habit, I write out some limit order in the pre-market to play this trick, hope one day some one walk into my trap!