When you open a forex trading account, you will be told by your forex broker that there are no commissions involved in currency trading. Most of the new traders take their broker words as true. They think that the cost of trading is minimal.
Forex brokers also called FCMs (Futures Commission Merchants) make profits through the bid-ask spread they offer to their clients for each currency pair. This bid-ask spread is the trading cost for you and the profit for your FCM.
Lets take a practical example. Bid/ask spreads are usually overlooked by the individual traders as the price they have to pay for trading. So lets calculate what your cost of trading can be in a year.
Suppose you are a day trader. You trade 5 times a day. Taking away the weekends, when you cant trade, there are 250 trading days.
As a day trader, you open and close your position before the end of the day. That means each position is traded 2 times.
Suppose; your start with an account size of $50,000. You are using a leverage of 4 only, you are cautious. So this $50,000 deposit will control (50,000) (4) = $200,000 for you.
Your Annual Turnover will be; (5) (250)(2)(200,000)= $500 M. Huge! Now lets calculate how much your broker will make and what your spread cost is. Spread Cost= (Annual Turnover) (spread)/2.
Suppose further, the bid/offer spread charged by the broker is 3 pips. 3 Pips Spread Cost= (500M) (0.0003)/2= $75,000.
Suppose, the spread offered by the broker is only 2 pips. 2 Pip Spread Cost= (500M) (0.0002)/2= $50,000.
You can see now, the cost of trading with a 3 pips spread versus a 2 pips is $25,000. Huge for you, this is 50% of your account equity. You see now that a 1 pip difference can result in $25,000 more as trading cost for you.
You will need to make a profit of $75,000 in a year simply to breakeven with a 3 pips spread. Trading costs are one of the most important reasons most active traders fail in the long run.