Per the Trading Combine Rules, you must only trade in the "active month" contract for each product.
Why does this matter to me?
To protect risk and avoid slippage, traders should trade the most active month. The most active month will be the product month with the most volume. This will start to shift to the new month starting on the date above. Follow the volume and you will be rolling into the most actively traded month.
How do I change the month of my contract?
Click here to find out how to change the contract month on your platform.
How do I know when my contracts roll?
We advise that you follow the volume of your product's contract month on the CME Group's website. Just click on your product and compare the Volume column./p>