GBP/JPY at the top of the channel, possibility of a drop?

GBP/JPY is stuck at the upper trend line of the rising channel.
Over the last 10 days, price has gone up slowly. However, it has not
broken out of the channel yet.

So, there might be a possibility for the sellers gaining momentum.

But, we need to see a big bearish rejection candle in the upper TL
which will provide the much needed momentum to push the price lower.

If there is bearish price action at the top of the channel, selling
GBP/JPY@154.60-155 with SL above 155.50 and TP at 150.50 would a possible
sell signal.