From the chart we can clearly see a reversal pattern formed ( Double Top), and also a break through the up trend support that has help for a long period.
As clearly seen, price is about testing the 0.66177 horizontal support. At this level, I'm expecting a little rejection to the upside before finally breaking through to the downside.
We can make our entry with 1:3RR at 0.66410, with SL=0.66826 and TP=0.65164