title: On Google Spreadsheet how can you query 'GoogleFinance' for a past exchange rate?
body: <p>I'd like to know if it is possible to query a past exchange rate on Google Spreadsheet.</p>
  
  <p>For example; using formula <code>=GoogleFinance("CURRENCY:USDEUR")</code> will return the USD/EUR rate at this present moment. How can you retrieve a historic rate?</p>