Although dollar's rebound from 89.18 suggests recent decline has formed a temporary low earlier this week, a breach of 90.71 is needed to signal correction is under way and bring further subsequent gain to 91.00/10, however, upside should be capped well below resistance at 91.63 and yield retreat later.  
Below 89.84/87 would bring weakness to 89.40/50 but only a breach of 89.18 would confirm the fall from 92.33 has resumed.