Pure technical play. See chart for analysis and markups.
Long term target indicated by the position tool, would suggest taking profit along the way at the 50% and 61.8% fib levels and leave a runner to chase the upper end of the range.
Not saying I see/know some sort of fundamental reason why the pound may be about to strengthen, or USD weaken, so I am prepared to tap out of this one. It is a very low risk trade but if it works it will provide nice return.