Dollar's retreat from 90.79 due to cross buying in yen suggests recent upmove from 87.10 has formed a temporary top earlier this week and consolidation with downside bias remains for correction to 88.80/90, however, reckon support at 88.42 would hold and yield rebound later.  
Above 90.35 would indicate pullback has ended instead, bring another rise to aforesaid resistance at 90.79 and then 91.10/20.