The stock was sold short as a pump&dump, and you would not be able to tell that from this chart -- need a finer scale data. What is remarkable here is the fact that Tim sold the stock short on the day of a huge break-out. Certainly if there is a technical side to this trade, it does not lie on the day scale. A profitable trade for Tim, he sold short at $4.30, covered at $4.19, according to the log kept on his site.