Leverage allows a large amount of currency to be bought with a small investment. The amount of leverage available to a trader varies with the broker, for example 100:1, meaning that currency trades worth $100,000 can be made with an investment of $1,000. The word “leverage” originally meant the effect of using a lever to move a much larger object. In forex terms, leverage allows the use of credit to buy more currency with just a small amount of money on deposit. That deposit money is usually called “margin“.