Because the foreign exchange market is global and includes all of the World’s largest banks, you can be sure that there’s always someone to trade with – unlike the share market where you might want to buy a particular share, but no one wants to sell (or vice versa). This ability to trade at any time is called liquidity. High liquidity means there is always someone to trade with, and there is little risk of a single trader or entity being able to move the price, as can happen in other markets, like the stock market.