The historical internal and external disk data mentioned in the question is essentially to query the active transactions and long-short comparisons on the historical day.
Volume and trading direction, long-short comparison is only one factor that affects the price, so futures companies ignore less important data when providing data.
In order to understand the historical internal and external disk data, it is suggested to try from the following two aspects:
The domestic commodity futures market will publish the top 20 position reports after the daily trading, so as to get a general understanding of the long-short comparison. Historical reports are multi-space comparison data.
K-line red and green candle chart, that is, the rise or fall of the day, probably reflects the contrast of trading activity. Going up means actively buying more, and going down means actively selling more.