Dollar's rebound after falling to a marginal low yesterday at 88.57 suggests a temporary low has been formed and consolidation with mild upside bias is seen, above 89.20 (yesterday's NY high) would encourage for gain towards 89.55 but break there is needed for retracement of recent erratic decline to 90.00 later.  
On the downside, only below 88.57 would risk one more fall to 88.20/30 before prospect of a correction due to loss of momentum.