We moved lower as expected then got a strong reaction at the .84 figure, which could be seen as an impulse, but wave 2 and wave x (in complex corrections) are always very strong because the market has not made up its mind.
In other words, this could very well be a corrective move. A new high towards .874 and the a break below .8550 would give us some conformation that we are going below .84
The alt. view (chart below) would be that the move from may high was a complex correction. A break above .8780 would put the alt. view in play.