When you trade in the foreign exchange spot market (where trading happens immediately or on the spot), you are actually buying and selling two underlying currencies. All currencies are quoted in pairs, because each currency is valued in relation to another. For example, if the EUR/USD pair is quoted as 1.2200 that means it takes $1.22 to purchase one euro.
In forex, investors use leverage to profit from the fluctuations in exchange rates between two different countries. The leverage that is achievable in the forex market is one of the highest that investors can obtain. Leverage is activated through a loan that is provided to an investor by the broker that is handling the investor’s or trader’s forex account.