Yesterday's breach of 89.81 (last Friday's high) signals the strong pullback from 90.78 has indeed ended earlier at 87.36 and upside bias remains for further gain to 90.10/20, however, broad outlook is consolidative and reckon aforesaid resistance at 90.78 would hold on first testing due to anticipated overbought condition, yield a retreat later.  
On the downside, below 89.00 (previous resistance, now support) would prolong choppy trading and risk weakness to 88.60/70.