What does the red data indicator in the IB Gateway mean?

Historical market data is available via a number of methods through our API offerings. The TWS API allows one to request historical bar data, historical tick data and histogram data, while the Web API allows one to request historical bar data.

For detailed documentation of this functionality and the associated limitations, please see:…

Clients can only see market data once the account has been funded. Once the account has been funded, the market data fees will be assessed for any subscriptions that were requested during the application process.

You can review and update your market data subscriptions within Client Portal. Please see …

While it is possible to connect an API application to a free trial account, neither real-time market data nor historical candlesticks are provided for any product that requires a paid subscription. 

Note…

If market data is unavailable, you may see a red market data (DATA) icon on the upper right corner of TWS. This condition may be due to a firewall issue or to connectivity issue. You may use the keyboard shortcut CTRL+ALT+F to refresh the market data connections…