The MT5 commission charges are charged based on each closed trade.
Example: If an user opens a 1.0 lot trade on a currency pair, USD 10 commission charges will be applied. However, users will not see the commission charges during in the "Trade" tab. The commission charges can only be viewed in the "History" Tab.
Users can take the following steps to enable commission charges to be seen in the History Tab.
1. Click "History" tab
2. Right mouse click on any trades and select "Position" to view all your positions.
3. Click "Columns"
4. Click "Commission".