IBKR operates two venues under the IdealPro label, one offering spot Forex trading and currency conversions and other, spot metals trading. See website for details:
What is IdealPro?
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What are the available Forex pairs?
Why are there two currencies show when trading forex, and how do they work?
Can I trade Spot Forex, Spot Forex Options and Forex Futures?
Can I trade Forex Forward contracts?