The lowest Australian dollar is 4.2. Although it is hovering around 4.5 now, in the long run, I think the Australian dollar should drop to 4.2. The Australian dollar, like the Canadian dollar, is a commodity currency, and its trend is linked to commodities. The Australian dollar is mainly linked to the price of iron ore. Now, due to the global financial crisis, commodity prices have fallen sharply. It can be seen that the demand will decrease from the original oil price 150 USD to the current 43 USD. This is also the reason why the Australian dollar has plummeted in recent months. Although it has risen a little, there is still room for further exploration. And now the Australian economy and the world are not very prosperous, so the demand for goods will not rise in a short time. The Australian dollar does not rule out the possibility of falling for a period of time. In addition, the Australian central bank recently lowered the interest rate from the current 5.25% to 4.25%. All these reasons make the long-term prospect of the Australian dollar poor. If you want to buy the Australian dollar, it is recommended to buy it at around 4.5, and the recent fluctuation should still drop to this point. The above is just my opinion, for reference only. If you have any foreign exchange problems in the future, I hope the above information can help you!