Why are some of the values in the FX sections of the Account window shown in italics?

While you can change the currency in which positions are denominated in for statement reporting purposes through selection of a Base Currency, you cannot change the denomination for trading, clearing, settlement or profit/loss purposes. The currency in which a product is denominated for trading, clearing and settlement purposes is determined by the product specifications of the listing exchange and is not subject to election by IBKR or the client…

The FX Portfolio - Virtual FX Positions section of the Account window is designed to show activity for currency pair trades for FX traders so that they can track average cost and running P&L on their currency trades.

• Since the "Position" value may reflect the sum of trades executed in the FX market along with currency conversions to change non-base funds into your base currency, these “virtual” positions do not necessarily reflect an actual cash balance in any currency…

IBKR Mobile offers a feature which will display position values and cash balances in your base currency. All position and P&L values shown in italics are recalculated from the local currency and displayed in your base currency. Please note that this will not change the denomination for trading, clearing, settlement or profit/loss purposes and is strictly informational…

The Close Currency Balance feature is only available for non-base currencies in the TWS Account Window. If you try to execute it from the base currency row of the Market Value - Real FX Balance area of the Account Window you will see it greyed out…