Interest Rates
Each country's currency has an overnight lending rate determined by that country's central bank. For example, the US Federal Reserve Bank meets periodically to set the Federal Funds rate. Higher interest rates attract foreign investment and induce domestic investors to repatriate overseas funds, increasing the demand for the currency and making it stronger. Therefore, any move to increase interest rates � or any development that could cause a central bank to increase interest rates � will tend to make traders bullish on that currency. The reverse also applies.Equity Markets
In the United States and other countries with developed equity markets, both the overall direction in equity prices and dramatic short-term moves tend to have an impact on the value of a country's currency. Money flows into a country as its equity markets rise and reverses direction in falling markets. Additionally, the equity markets serve as a sentiment barometer for a country's economic prospects. The more positive sentiment for country's economy, the greater the demand for its assets.International Trade
A nation's trade balance is vital in any assessment of its economic health and more specifically in measuring the strength of its currency. A trade deficit causes a weakening currency, since more of the country's financial resources flow out of the country than other nations' flow in. For foreign exchange markets, any unexpected move away from a nation's trade balance baseline will usually trigger increased trading and a price movement.