There are many forex brokerage companies, gold broker, CFD, and stock brokers. you should be more careful and observant in choosing a broker to invest. Use a brokerage company which provides fluctuating price spreads following the movements in Real Market (No Fix Spread), because the difference between selling and buying prices in the market is also volatile (sometimes it can be 2, sometimes 10, sometimes 3, etc.) , and can’t be Fixed,
If the Forex Broker displays Fix Spread prices then we can be sure it's not the Real Market price, and this broker is playing cheat behind the to manipulate trading results.