I bought MRO yesterday at $3.43 and tried to sell it this morning at $4.75. The price kept freezing and my limit orders were not working despite hitting the bid. At $4.35 I put in a market order, but it also wouldn't sell. The bid went to 0.00. I figured some error and I cancelled my market order after a minute or so getting worried I'd be filled at $0. I eventually sold it at $4.15 and the price is currently frozen again at 3.94. What is going on? Are there just not enough buyers and sellers in that stock? there is 8m traded this morning though...