Sorry I was asleep when you replied.
I have attached a chart that might help to explain what I meant... what I was saying is that shorting UJ at the 91 level would be a fair play however I would be careful that we are near the bottom of a (daily period) channel (indicated on my chart by the red trendline). This is where price could struggle so I would be prepared to move your stop loss to breakeven now. If we break through then your trade will hopefully remain open but if the red trendline causes a problem then you have removed your risk by moving your stop loss.
Hope that makes more sense.
Regards,
Dan