You also can use:
Financial data from Quandl in Wolfram Language using QuandlLink
<< QuandlLink`
AUDvsUSDrates = QuandlFinancialData["CURRFX/AUDUSD",
startDate -> "1995-1-1", endDate -> "2015-5-1"];
DateListPlot[Transpose[{#[[All, 1]], #[[All, 2, 1]]} &@Rest[AUDvsUSDrates]],
PlotTheme -> "Detailed"]
