In the futures index, VOL is the volume index, and the volume refers to the total volume of futures contracts, which is formally represented by a vertical line.

Tips: The above explanations are for reference only. There are risks in entering the market, so investment needs to be cautious. Before you make any investment, you should make sure that you fully understand the nature of the relevant investment and the risks involved, and then judge whether to participate after detailed understanding and careful evaluation.

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