The Reserve Bank of Australia have popped up a helpful explainer on exchange rates

As part of its Q4 'Bulletin' it has a piece on:

In there you will find plenty of useful stuff including a section on intervention in the Australian dollar:

  • the Bank can still intervene in the foreign exchange market if it becomes disorderly or dysfunctional

As you can see, its been a while:

But, hey, never hurts to be prepared!