According to the principle of economics, the change of interest rate is the data that directly affects the trend of exchange rate. If the interest rate rises, the return on investment in this country will increase, which will lead to a large inflow of international capital, increase the demand for local currency, bring pressure on the appreciation of local currency or directly lead to the appreciation of local currency. On the contrary, if the interest rate falls, the local currency will depreciate.

Unemployment rate is an important indicator of the capital market, which is lagging behind.

Unemployment rate% = unemployment/(employment+unemployment)%

The rising unemployment rate is a signal of economic weakness, which can lead to the government's monetary easing policy (interest rate reduction or issuing domestic currency), the exchange rate falling and the local currency depreciating. The decrease of unemployment rate is a signal of economic improvement, which can lead to the government's monetary tightening policy (raising interest rates or stopping issuing local currency), the exchange rate rising and the local currency appreciating.

Inflation rate is the ratio of excess money to the actual amount of money needed to reflect the degree of inflation and currency depreciation. Usually we can use the consumer price index (CPI) to measure it. At present, developed countries, such as the United States, Britain, the euro zone, Australia, etc., have set 2% as a more appropriate inflation target.