As currencies from different countries interact in the Forex market they will face periods of appreciation or depreciation in their value respect to other currencies being traded in the global currency markets. For example a great depreciation can happen when driven by the panic of bad economic news in a country, most holders of the currency start trading it for more secure assets causing the currency of that country to depreciate; as for the ruble against the U.S dollar in the 1998 crisis in Russia.
Once you have access to a fast news data feed at Bloomberg then you can …

