The fixed factors that impact currency exchange rates are generally identified as inflation, interest rates, and trade value. Trade value has to do with the ratio of business and service trading that takes place between the two countries that issue the currency. In the event that one country purchases more goods and services from a given country than it imports to that same country, the value of the each country will reflect that difference. In effect, the country that gains the most from the sale of goods and services between the two countries will have a currency that is rated higher in value.