Divide the position by the volume to get the turnover rate. Relatively speaking, varieties with high turnover rate fluctuate greatly. The handling fee is calculated by yourself. According to the unified transaction amount, such as the 3 yuan of soybean meal per lot, divided by 3 (soybean meal price multiplied by 10) to get a few ten thousandths, and then compared with rubber and thread itself according to the handling fee of several ten thousandths. You can make a choice.