Copper and aluminum are global markets, and their supply is affected by the economic cycle. When the economy is active, demand increases and prices rise; When the economy is depressed and consumption is sluggish, prices naturally fall.
Affected by monetary policies such as the sharp depreciation of the US dollar, the commodity price index soared, which also boosted the recent surge in basic metals.
The investors in the copper and aluminum market are complex, including not only speculators, but also a large number of hedgers and arbitrageurs. Unlike other varieties, most of them are speculators, so metal futures are more volatile, and the actions of washing dishes and shaking positions are far greater than those of other varieties.
Shanghai copper and Shanghai aluminum are linked to the international market, and LME, COMEX and Shanghai Metal Exchange interact, so the market is not easily manipulated by large households.
You can judge from the above points that the interaction between trends does not seem to be great.