Although dollar's strong rebound from 99.31 suggests the correction from this week's high at 101.45 has ended earlier and consolidation with upside bias is seen, a firm breach of 100.89 is needed to signal recent upmove has resumed and bring subsequent re-test of aforesaid top.  
On the downside, below 99.75/80 would yield another fall towards 99.31 but only break of this support would extend the decline from 101.45 to 98.90/00.