Internal futures are domestic futures and external futures are international futures, but the internal and external futures do not mean this. The inner disk and the outer disk in futures refer to the inner disk data and the outer disk data. In futures, the inner disk is actively sold and the outer disk is actively bought, which represents the buyer's market and the buyer's market in futures trading, so the inner disk and the outer disk in futures can also reflect whether there are too many futures transactions or space.