Notice how the ATR goes down throughout the entire upward move beginning from 4 September 2015. It has finally changed direction in the beginning of the last downward leg, that is, the P1-P2 leg shown in the chart. Interpreting the P2-P3 leg is crucial in this short. First, It bounced from the LMLH, which indicates that the target is UWL1. Second, it is clearly a less enthusiastic move in terms of the ATR. It is important here to also note that the ATR turns upward again with the final bounce from LMLH. Third, P3 could not reach the ML of the P0-P1-P2 . Thus the Hagopian rule says short when the upward TL is broken. Well, it has been broken today. Fourth, the last candle of P2-P3 is a reversal candle. Fifth, the crossover. All in all, it seems there's enough reason to go short on this pair.
The lower time-frame charts suggests that there might be little pullback during the day. So maybe it's best to wait until we close the last day candle, and short then.