The Foreign Exchange (Forex) market is the largest and most liquid financial market in the world. Forex can be attractive to investors due to the high volatility caused by constant movements of currency pairs. With Forex you are able to speculate on the strength of one nation’s currency (the base currency) against a second nation’s currency (the quote currency). Foreign Exchange is always traded in pairs – if a trader decides to sell a currency, then they are undoubtedly purchasing another.