IB provides real-time streaming market data for free or at the price we are charged by the exchange. The Market Data Subscriptions page lets you sign up for additional market data subscriptions such as NASDAQ TotalView and NYSE Open Book or unsubscribe from market data.
Here are a few important things to remember about market data subscription fees:
To use the market data subscriptions page
The Market Data Subscriptions page appears.

Select the account you want to be billed for market data, then click Change Billing Account. Beginning with the next billing cycle, your market data subscriptions will be billed to the account you selected.
The Market Data Subscription page opens again, with your new selections updated and any pending subscriptions identified as such. Market Data subscription updates take effect immediately under normal circumstances.