Through foreign exchange data, we can know the economic operation of this country, which will have an impact on the central bank's monetary policy and macroeconomic policy. For example, the recent poor performance of CPI inflation data in the euro zone, then we can judge that the current loose monetary policy in the euro zone has not played a very good role. In order to ensure the smooth operation of CPI in the future, the euro zone may continue to loosen or even increase its easing efforts.

These are all interpreted by us through economic data.