The greenback weakened to a low of 88.83 yesterday, suggesting the corrective upmove from last week's 8-month low of 88.01 has possibly ended at 90.47 on Monday, however, a breach of pivotal support at 88.65 is needed to confirm and yield resumption of recent decline for re-test of said low.  
On the upside, above 89.90 would signal pullback is over instead and bring another rise to 90.47, break would extend gain to 90.80/90, however, 91.59/63 resistance area would remain intact.