price pattern is indicating 120.00 proximity is a frequent bounce point. So shorting it at that proximity is very risky. stop sells around 119.80, may be a more prudent move.
usd/jpy builds a house of cards, then in a matter of a few sessions blows away the long term positions that are long. Thats its trading pattern, so price action should be telling you more often then not, being long has a higher probability of working out, but being long at the top end of a week to week range is not prudent either.