Wondering how low it can go

Perhaps this is something that only people living overseas but paying mortgages in Australia care about, but I am amazed by the size and speed of the drop of the Australian dollar against the US dollar. This graph helps explain what I mean:

(Stolen from Yahoo! Finance)

That’s a big correction. I wonder where the bottom will be? Should I move money now? Should I wait? I guess its time to consider dollar cost averaging my exposure to the forex market.