There is an ascending triangle taking place and the price breaks out now.
An ascending triangle typically indicates an extension in the downward direction when price breaks through the support.
A further rangebound to 155.5 is likely on a break below 155.6.
A rectangle is close to completion and AUD/USD lacks a next strong move for the certainty of breakout.
A rectangle typically predicts that the price to go down if price breaks out to the the downside.
There is a chance of a bearish move to the 0.645 zone as the currency pair failes to keep gains.