Web Problem: Go to www.oanda.com/currency/ big-mac-index . Oanda reports the last available Big Mac index but then

Question:

Web Problem: Go to www.oanda.com/currency/ big-mac-index . Oanda reports the last available Big Mac index but then updates the exchange rates on a regular basis to compare them with the PPP-based exchange rates. What are currently the most undervalued and overvalued exchange rates? How would you use this information in forecasting exchange rates?