AUDUSD 240 – is there a trigger for a long trade?

Anybody please comment: We are forming a nice double bottom that is below a long-time low from 2016. We are in a 4H DT since 18 July 2019 and a 1W DT since 22 Jan 2018. I think it is time to look for a retracement upwards. But I am not seeing a potential trigger for the trade – the RSI and PA trend crosses are ancient history.

Does anybody have any suggestions what to watch for? I suppose if it breaks above the 21 and 78 day EMA’s, that might be useful. What do you think? Any other ideas?