Generally speaking, as a Professional, the cost of the market data subscriptions will be higher. Find our Market Data Fees in the IBKR website.
What will the impact be if I am designated as Professional market data subsriber?
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Are market data subscriptions per symbol or per exchange?
What does "fee waived" mean next to a market data subscription?
Are Professional accounts subject to different commission rates?
Can I get level 2 data for EDGX?