The methods to manage the risk of metal price fluctuation include: hedging with futures, time control and position control.

1. Hedging with futures: In order to avoid the risk caused by nickel price fluctuation, futures can be bought and sold at the same time, thus offsetting the risk of price fluctuation.

2. Time control: control the holding time. The shorter the holding time, the smaller the risk. The longer the position, the greater the risk.

3. Position control: The heavier the position, the greater the risk, and the lighter the position, the smaller the risk.