Premlata and Monica were discussing about how the exchange rate between 2 different countries changes with time due to external factors. When the exchange rate falls due to change in market forces of demand and supply, what does it imply? 

Currency appreciation

When the exchange rate falls we term it as appreciation/revaluation. When the fall is due to change in market forces of demand and supply - Appreciation, when the fall is due to the intervention by the government - Revaluation.