Your comparative data is based on your previous similar cycles. For Example full stim cycles will be compared against one another, and FET cycles will be compared against one another, regardless of protocol type.
This will help you to easily see the progress of your current cycle against a previous protocol.
If you can’t see comparative data, it’s because you haven’t entered your previous cycles. If you have a previous cycle, navigate to Profile > Previous Cycle, click on the plus/add button and follow the instructions.