Option Workshop support the following data sources: 

• Interactive Brokers;

• Rithmic;

• IQFeed;
• OPRA (and-of-day).

The general procedure of the data source selections (fig. 1):

1. open the Data sources tab;
   
   Figure 1 – Data sources tab
    
2. select data sources in the drop-down list;
3. fill out the fields;
4. click OK button to apply settings.