Pair rose to 23.6% Fibo support but failed to do much beyond the same .
Pair's refusal to extend gains and sustain above 107.02 (23.6% of 111.82-105.51) indicates the pair could be heading back to key support of 106.64 (38.2% of 2011 low-2015 high). A break lower would expose 106.00-105.55 (May 3 low).
On the higher side, a break above 107.63 (April 11 low) is needed to open doors for a corrective rally in the pair.