Yes, for most products, we allow trading in the front month contract and the next active back month. For certain products, we allow additional back month contracts to be traded. To request, additional back month contracts to be enabled for your account, please submit a risk change request, including the details of what products and number of contract months you wish to trade.
You may request a risk change by going to your Application Settings:
This will default to the Accounts tab:
In the Live Accounts section of this page, there is a link for risk setting change:
You would then select Back Month Trading from the Change Type and enter the product(s) and number of back months needed.