Dollar's rebound after yesterday's breach of previous 90.15 support and subsequent selloff to 89.63 suggests pullback from Monday's 90.69 has ended there and above 90.15 would bring further gain to 90.45/50 but break is needed to signal upmove from last week's 88.14 has possibly resumed 90.69 first.  
On the downside, only below 89.40/45 would yield stronger retracement of aforesaid rise to 89.00/05 before another bounce occurs.