For the convenience of analysis, the futures contract has been added with continuous or triple contracts, in which the sugar is the trading contract one month after the current delivery, and the triple contract is the third trading contract after the current delivery, so it cannot be traded, and it is only used for analysis reference.

As for why it is set up like this, it is because we have summarized the law of market changes for a long time. The futures contracts one month and three or four months after the current delivery month are the contracts with the closest price to the spot expected price, and they are also the most active contracts, and most of them are also the main contracts in a variety. Therefore, we put such contract prices together continuously to reflect the long-term trend. So there appeared the data of "XX continuous", "XX even three, even four". The main contract refers to the contract in which positions and transactions are the most active.