The difference between futures continuous contract and spot continuous contract
If, for example, you look at the historical trend of 1204 contract, the market price of 1 from April to April of 12 is taken away by 1204 contract, and 10 from April to April of1.
Continuous means March, which shows the real trend of 1203 contract. By April, the contract of 1204 was displayed.
The numbers 06 1 1, 06 12 in your question are not June1and June 12, but two-month contracts in 2006, that is, June1/kloc.