How is it hard? Anything priced in yen (including gold!), is a screaming buy. Not because of the actual asset, but because of the Yen. Everything looks great priced in Yen.
I suppose if you’re on the 15 min time slice it’s hard. Predicting currency in 15 min increments is hard. Because it’s noise. On the daily? Any 5 year old can tell you where the trend is. And your risk/reward is so clearly defined.