It is the cardinal source of earning of a broker. A Forex spread is the difference in price between what a Forex broker will buy the currency from you for and the price at which they will sell it. The broker will have no problem whatsoever selling off the dollars they just bought, so they do not need to charge you, the trader, a higher spread. Trade12 charges a smallest spread to the traders starting from 0.1 and it definitely accelerates trader’s profit.