Although yesterday's anticipated rise to 91.46 signals dollar's erratic upmove from this week's low of 90.31 remains in progress, as this move is viewed as a retracement of recent decline from January's high of 93.78, near term loss of momentum should prevent further strong gain today and reckon dollar's upside would falter below chart res at 92.05 and bring strong retreat later.  
On the downside, a firm breach of 91.00/04 would be the 1st signal an intra-day top is in place and bring re-test of yesterday's low at 90.79, however, reckon 90.31 would continue to hold from here.