The volatility will probably continue while funds load up and the buyback continues. Look for a roller coaster ride, often down, punctuated by days of big gains, with a net clear uptrend over time, as MM's distribute slowly and reload for additional distribution (to service clear accumulation by investors - this is MM distribution to investors, not investor selling).
This stock is oddly volatile despite the clear uptrend. I theorized why that's happening in another post - fund accumulation and the buyback helped by MM friends. Today showed consolidation of the recent move. I think we will range trade between 15.17 and 15.71 while accumulation continues.
I'm fully invested well below 14 and just holding. I'm open to adding more, but I also need practice picking another winner more than I need even more shares of WU. :-) Diversifying to one more stock might not be a bad thing :-) Very comfortable holding WU "with my eyes closed" for the next several Q's at least. Ignoring the volatility, this is going nowhere but up.