Failure to break above 98.5 could see a brief dip to 98 before breaking higher. Alternately, if price closes above 98.5, then a test of support is need to validate a sustained move higher.
I've been following the DXY moves for the past few weeks as I believe that a weakness in the US Dollar is in store. So far, a 2nd test to 100 has failed, that's our first clue. For now, 98.5 is the level to keep an eye on.