This is an XBT Basis/Contango/Backwardation chart.
If you don't know what Basis, Contango and Backwardation means, please do a search with the search engine of your preference.
In the Top Pane
Blue line graph:
- This is the Basis expressed as how many percent the Perpetual Swap deviates from the Futures Contract.
- Below the (purple) Zero Line means the...