Probably a T trade. You can pretty much tell whether the Form T trades are from large block buyers are sellers by looking at the price at which the trade was entered. If it is at the lower end of the day's price range, and the stock had been under pressure that day, it was probably from a seller. By the same token, if it was printed at the higher end of the range and the stock had been strong that day, it was likely to have been from a buyer. This rule is not absolute, however.