Euro's intra-day selloff from 1.5644 signals recent decline from record high at 1.6020 has once again resumed and below 1.5510/16 would extend weakness to 1.5470 before prospect of a corrective rebound later today or tomorrow due to oversold condition.  
On the upside, above 1.5600/10 would signal temporary low has been formed instead, bring retracement to 1.5644 and then 1.5660/70.