The question you want to ask is what do rapeseed meal index, rapeseed meal main force and rapeseed meal sustainability represent respectively? Because these can't be traded by themselves.

Rapeseed meal index: refers to a weighted average price of all rapeseed meal contracts listed now, which is rapeseed meal index;

Rapeseed meal main force: refers to a main force contract of rapeseed meal at present, which is judged according to the size of positions. Among all rapeseed meal contracts, the main contract holds the largest position. For example, the current main contract is rm 150 1, which will change with time. Generally, it will appear in the three-month contract of 1, May and September in turn.

Rapeseed meal continuous contract: refers to the contract in the latest delivery month. For example, the latest delivery month is 14 1 1, which means RM141.

I wonder if you can accept this?