Using Interactive Brokers (often known as IB) for the market data service and using Sierra Chart for the charting software is a popular combination amongst new traders and professional traders alike. Sierra Chart can be used with Interactive Brokers without any undue configuration, but one of the requirements is to configure Sierra Chart to access your Interactive Brokers' market data.
Sierra Chart's market data configuration screen is accessible via the "File -> Data/Trade Service Settings" menu or the "Global Settings -> Data/Trade Service Settings" menu, both of which will display the market data configuration screen as shown.