Recently, commodity futures have fluctuated greatly and the continuity is poor, but this is only the characteristic of this period, not always the case.

The daily ups and downs are basically affected by the news. For example, the Fujian -P 'X incident some time ago caused PTA to open higher and daily limit. For example, the news of overseas mine closures triggered the daily limit of iron ore.

The continuous and rapid changes in the daily line are generally special changes in fundamentals, such as purchasing and storing, not forcibly opening positions and so on. This mainly indicates the beginning of the trend market.

There are few sharp ups and downs at the weekly level, so it is approximately Zhou Du's. Continuous rise and fall indicate the trend market.