Well, you are assuming that the volume on the bid are all sells. When you say the volume for sells were larger are you referring to the prints on the bid or are you just using the ihub tool that states a buy or sell print? Remember, theoretically there is a buy for every sell. If you are selling something someone else is buying it. Could be retail, could be inventory of a market maker. Usually when you have a lot of prints on the bid it is an indicator that the stock will tick lower but it does sometimes happen where there are prints on the bid and upticks.