The dollar is turning bullish, but yen crosses still at risk from BOJ expected rate increase this month. Track the nikkei too with the usd.yen. Exporter component moves with the USDJPY. Since its at the top of the range, the risk is that reversion to mean players will try to knock it down back into the range.
The trade that seems to work is just go short at current levels and place a stop at 120.10. And a buy stop at 120.15. With current levels at 119.60 thats a 50 pip entry to stop range. Since 1% stop loss on equity or less is prudent, only 1 lot can be placed with such a large stop. Basically the point of stops is that when they get hit, it will change the models/sentiment.