The internal market refers to the commodities listed on domestic commodity futures exchanges, while the external market refers to some foreign markets, mainly the United States. In this way, the so-called inner disk and outer disk in the transaction means that most of what we do is inner disk, but the inner disk is often affected by the outer disk. Sometimes when the inner disk closes, if the outer disk fluctuates greatly, then the inner disk will have a larger gap opening, so be sure to pay attention to the outer disk.