Master Boyi's inner disk and outer disk represent the sum of the number of hands actively sold and bought by the market from the opening of the futures contract to the current moment (in short, the inner disk actively sells and the outer disk actively buys).

For example, at 10 today, you see that the inner disk of sugar 120 1 is 200,000, and the outer disk is180,000, which means that within half an hour from 9: 30 to 10 today, sugar1. Similarly, if it is 14 pm, with 450,000 inside and 600,000 outside, it means that the total number of active selling lots of sugar contract 120 1 is 450,000, and the total number of active buying lots is 600,000.