Stop loss of speculative spot asphalt is a means to control risks, because there is no limit to the rise and fall of the spot market. Therefore, when we go in the wrong direction, we must set a stop loss so that we can continue to come back next time. Take profit is a way to protect profits. When you make money, you will be out in time to prevent the market from reversing, and the profits you get will be gone. Spot crude oil must set a stop loss and make a conclusion according to market dynamics. Holding positions overnight is easy to cause losses. Asphalt products fluctuate violently, so avoid holding positions overnight. You can refer to the 5-day moving average and 20-day moving average of spot crude oil to set the stop-loss and profit-taking price of spot asphalt more accurately and avoid Man Cang operation.