GbpJpy is in strong resistance. Good time to sell?

Since 150 recent low on 20 December, GbpJpy has risen strongly and has gained 600 pips.
At this moment the pair is trading exactly in a strong resistance zone and normally this would be a good sell signal.
However, considering that GbpJpy is a very volatile and, more importantly, a trick pair, I expect a spike up before the drop.
A clear sell signal is given by a new low under yesterday's