It's normally possible to explain any price turn with a 161.8 completion move on some time frame.. In this case AUDUSD turned back up strongly on a h4 but if we switch to a m5 we can find the turning point occurred after a bearish 161.8 completion cycle.
23.6 also plays a very important role. Here, in addition to the 161.8 m5 completion, AUDUSD is bouncing off a much larger (h4) TF bearish 23.6 from above. Above this level is potentially bullish, a break & close below it is potentially very bearish.