You use todays spot rate of the Brazilian real to forecast the spot rate of the real

Question:

You use today’s spot rate of the Brazilian real to forecast the spot rate of the real for one month ahead. Today’s spot rate is $.4558. Use the value-at-risk method to determine the maximum percentage loss of the Brazilian real over the next month based on a 95 percent confidence level. Use the spot exchange rates at the end of each of the last 6 months to conduct your analysis. Forecast the that would exist under these conditions.

Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...