Generally speaking, the trend of futures price should be the mainstream, and the electronic disk will follow the futures, because futures have value and price discovery function, and many speculators and spot traders play games in it.

There are short-term and long-term electronic disks, and the choice depends on the price of the specific contract.

When there is a reasonable price difference between futures contracts and electronic disk contracts, arbitrage can be carried out. The price difference includes capital cost, storage cost, distribution cost and transaction cost. And the specific varieties are different.

Colored varieties are very risky, especially copper. So in order to avoid risks, it is best to do some hedging or arbitrage.

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