In my view not a bad move once we get the "market mood" established on Monday morning.
During previous times of substantial market volatility I have seen participants exit stock positions on Friday, fearful that over the weekend world events could lead to dramaticly different conditions at the Monday open. That is my view of why things seemed to be in "stall mode" on Friday afternoon.
As a long I didn't consider selling at 4.50. As others have mentioned nothing specific to this company has changed. Therefore I still see it as a buy at this level although I have to acknowledge that my position is established and I have decided not to "play the dips" for the immediate future.
Onward and Upward