Nothing wrong today. This is why charts aren't worth paying attention to the vast majority of time. The only thing that separates stock price fluctuation from randomness is that volatility clusters in stock price chnages.
Institutional liquidation. It's more dramatic when they wait til the end of the day and do heavy liquidation. This can cause the stock to show off a large amount for the day. It was not down that much but it looks like someone was trying to make a show they were liquidating by doing that.