Why does the profit shown in my trading platform differ from the sum by which the balance has been increased?
The point is that in your InstaTrader setups the option to show the deal result in the currency of the order, not in the one of the deposit, is selected. Select the option by the right click on an empty field in the section "Trade" at the bottom of the platform window, then choose "Profit" in the context menu - "In Deposit Currency".