I have noticed in my trading that Forex is quite likely not to follow the trend channel. Probably, because people take profit early in their trades or simply Forex market just works like that.
Here is a possible way to trade this set up, long or short.
1. Wait for deviation.
2. Possible that a second trendline can be drawn. It kind of helps to find an entry point.
3. Wait for MACD trend-weaknesses. E.g. around 0.
Do the trade when 1 - 3 met. Target the old trendline.
TODO: Test the above theory