Commission rate is a technical index to measure the strength of market trading in a period of time. The calculation formula is: commission ratio = (number of entrusted buyers-number of entrusted sellers)/(number of entrusted buyers+number of entrusted sellers) × 100%. As can be seen from the formula, the value range of royalty ratio is-100% to+100%. If the commission ratio is positive, it means that the market buying is strong, and the larger the value, the stronger the buying. On the other hand, if the commission ratio is negative, it means that the market is weak. In order to reflect the real-time trading strength in the market in time,