One of the instruments of monetary policy, which exists in each region and is established by special managerial authority of Federal Reserve System of the region. Several times a year, on particular dates, these authorities hold meetings. Interest Rate Index directly influences on the national economy. High level of Interest Rate USA slows the national economy, low level stimulates it. Interest Rate Index has significant online forex market influence. For several weeks before the decision is made by the authorities, market players share their opinions on the future decision. Expectation of the direct decision forms the reaction of investors and, consequently, influences on the currency rate. The data on Interest Rate is published after the meeting of Federal Reserve System authorities is over.