Trading in the US overnight trading session is available to IBKR Pro and IBKR Lite accounts. US Stock trading permissions are required along with an updated 'After Hours Trading Risk Disclosure' form that has been signed.
Additional Information
Who is eligible to trade in the US overnight trading session?
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What trading permissions do I need to trade U.S. stocks?
Can I trade in fractions in the US overnight trading session?
What products can be traded in the US overnight trading session?
Can I trade on the Toronto Stock Exchange in my IRA?