A Type 2 Bullish Shark Pattern has formed in the USDJPY 4hourly chart. A type2 Harmonic Patterns mean that the market has fulfilled at least Target1 of the entire setup. At times we can have a weaker(slower) move towards the upside.
On the 1-hourly chart, you could plot a trendline and set an alert to wait for a break and close above the trendline as an additional filter for your long entry.