TSLA had a 3 day selloff mid August on higher than normal volume. When it hit the bottom and started to turn, the sells battled the buyers. This showed in the 2 and 3 days vwaps at the time. You can see the trades that formed as the buyers bought at the 2 day, while sellers sold the 3 day. On the open the buyers won, moving slicing trough the 3 days for a nice runner of a day.