Hello, because futures will expire and will not exist after delivery. Each futures contract only exists for a few months. If you want its long-term trend, you can only look at "sustainability". A50 refers to the continuous contract in the latest month (not the current month), where the "continuous month" is not a fixed month and always changes. For example, when the contract of 202005 expires at the end of May, 202006 will be regarded as "continuous in the same month". In this way, you can also view the historical contract indicators of the month after a few years.

Generally speaking, the term "consecutive month" in A50 futures index is for investors' reference only. It is convenient for investors to do long-term technical analysis. So will the next season.