Why did I receive an execution when I did not enter an order?

Any open position, including non-base currency, can be closed by IBKR when the account is in a real or projected margin deficit. A Liquidation is done automatically and the Liquidation algorithm decides what to close. Please remember that IBKR's Liquidation system is designed to close positions to reduce margin requirements and ensure the account becomes margin compliant. …

When an account is in a margin deficit, any open position can be liquidated by IBKR to return the account to margin compliance, including currency positions. In addition, IBKR may act to convert non-base currency balances as described in the How can I close out the nominal FOREX positions in my account? …

When you invest in a product denominated in a currency other than what you are holding in your Margin account, it is not necessarily required to convert currencies to place the order.

• If you enter the order to open the foreign product position and do not make a currency conversion, you will open a margin loan in the currency of denomination of the product. On the margin loan you accrue…

Clients maintaining a cash or margin account opened via IBKR (Taiwan), are required to select their base currency when completing the account application process. While the account does not need to be funded in the base currency, funds below 5 USD or equivalent in any other supported IBKR currencies will be automatically exchanged to the preset base currency…