Copper and aluminum: After the short-term suspension of the 3090 line, the LME copper transaction showed a range trading pattern. The closing price was 3,058 yesterday. The trading volume also kept the recent tepid feature: more than 40,000 hands. The author proposes the following points: (1) After the rebound of the US dollar exchange rate, it has reached a key zone: whether it will continue to rebound or make adjustment after a rebound. In the near future, there should be action. (2), Shanghai copper 502 contract to force positions, the price a few days ago is close to the 32000 --- forced positions also have to be carried out, but the transaction price may remain high volatility, and then how much space above 32,000 is not difficult. (3) LME copper has just fallen back to the 3,050 line from the 3120 line. It is not realistic to return to 3100 or above immediately. It may take a while to make a difference. Suggestion: More than one position holds a small amount of position. Shanghai Aluminum opened higher and lower yesterday, trading range is very small. Quotes will remain in this zone, and the market will not be in a short period of time. It is recommended to hold more than a small amount.