After the basis trading contract is signed, the basis size has been determined, and the futures price has become the only unknown factor that determines the final buying price, and the futures price generally accounts for more than 90% of the overall spot trading price. Therefore, the point price has become the most concerned factor for the basis buyers. In order to maximize profits, buyers should focus on when to set the most favorable futures price for themselves, that is, the timing of the price. When the futures price is in the downward channel, it is beneficial to the basis buyer. At this time, we must wait for the opportunity of price inventory, and then conduct price inventory when the expected futures price bottoms out.