If AUDUSD dribbles a little higher, then reverses before reaching .6780, that would make a strong case for a completed bullish impulse wave with an extended wave 1.
Then, after a brief setback that carries back to the price territory of the previous 2nd wave, another strong bullish run would ensue.
This pattern is very specific and suggests AUDUSD would need to rally a little bit further, but not beyond .6780 in the near-term.