As of yesterday 25 Sep 2018, the current month CPO18SEPFUT contract has a traded value of 6678.77 lakhs while the next month CPO18OCTFUT contract has a higher traded value of 7468.97 lakhs. So, liquidity has already moved to the next month contract. But still, I could not take a position today in CPO18OCTFUT contract as it gives an error:
RMS:Blocked for mcx_fo CPO18OCTFUT block type: ALL
I had contacted Zerodha support with the same problem some time back with MENTHAOIL contract. But I got a response to the effect that it is an RMS rule. @nithin , could you please review this RMS rule with your team so that we can trade the next month contracts, especially once they become more liquid than current month contracts?
Full-service brokers allow trading of next month contracts as long as liquidity is above 0. But there are many advantages to trading through Zerodha instead of them 
So, it would be great if this is enabled at Zerodha too.