Why are the buying and selling price different?
You will see a buy and a sell price on the screen. The difference between them is called spread. If you open a position and close it immediately, this difference may create costs even without a price movement. It should not be assumed that the tight spread you see in a calm moment will remain the same during news hours or when liquidity decreases. Just because 'commission-free' does not mean the total expense is zero. Confirm in the interface which price is your buy and which is your sell.
Calculate the cost with your own position size
In an abstract training example, let the price difference on a 10,000-unit position be 0.0002 countercurrency units per unit. The spread equivalent is approximately 2 units. If a total of 3 units of commission is charged for opening and closing, the first expense will be 5; carryover and exchange rate conversion are not yet included. This example does not represent the price of any currency pair or brokerage firm. Note that lot size may vary by product; Always convert the transaction amount into actual units.
