What is “Spread”?

The spread is the difference between the bid and the ask price. On the GBP/JPY quote below, the bid price is 181.000 and the ask price is 182.000. If you want to sell GBP, you click “Sell” and you will sell Great Britain Pound at 181.000 and if you want to buy GBP, you click “Buy” and you will buy Great Britain Pound at 182.000.