If I put it simply, The forex spread is the difference between a forex broker's sell rate and buy rate when exchanging or trading currencies. Spreads can be narrower or wider, depending on the currency involved, the time of day trade is initiated, and economic conditions. Anyways, these sorts of basic terms are pretty well explained in your broker's educational area. Since I trade with AssetsFX, I really don't need to google the basic aspects such as this.