The 16/03/2015 the Euro Dollar slowed its fall (opened in 1.04701), and never again be there until the 12.03.2015 where he approached with record lows of 1.05168. Not without having had a maximum of 1.17140 on 24/08/2015.
So in my opinion, taking from the minimum point where the fall March to August peak stopped, so should be the Fibonacci retracement on daily...