Central  Banks  - The national central banks play an important role in  the (FOREX) markets. Ultimately, central banks seek to control the money supply and often have official or unofficial target rates for their currencies. As many central banks have very substantial foreign exchange reserves, their intervention power is significant. Among the most important responsibilities of a central bank is the restoration of an orderly market in times of excessive exchange rate volatility and the control of the inflationary impact of a weakening currency.