No, I really wasn't paying attention. If yo look at the 5-minute charts for the 28th and 29th. It looks like there was short selling for a day trade on the 28th and short covering and new long positions entered into at the close. On the 29th, it looked like the new long positions from the 28th were dumped at the close on the 29th and there would have been some short selling at the close. If the price goes lower on Monday and you see volume at the close again, it would be short covering. Sometimes the market makers need to get out of naked shorts to close there books for the day. Normal floor trading stuff.