Counting the advance from the 2016 lows (US markets put in a low in 2016) the move can be counted as a clean looking impulse wave (5 wave advance). So I suspect its closing on a peak for wave , it needs a strong reversal back under 75.00 to consider further weakness and make the case wave  has ended. So if you own this stock I would recommend you lifts stop to 75.00, that way you can protect any gains you may have and not suffer a serious drawn down.
There is a measured move target just above 86.00, thats a good area for the upside to find sellers.
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