There are three top and bottom indicators for Tongdaxin's accuracy of 100:

1. Even distribution: the number of securities changing hands on the day is evenly distributed between the highest price and the lowest price of the day.

2. Triangular distribution: The number of securities changing hands on the day is triangularly distributed between the highest price, lowest price and average price of the day.

3. Historical turnover attenuation coefficient: Indicates the decreasing speed of historical turnover. How many times the turnover rate of the day is removed from yesterday's cost distribution to obtain the cost distribution map of the day. When there is no circulating disk data, the number of days of cumulative trading volume is used. When there is no circulating disk data, the number of days of cumulative trading volume is used instead.

The daily K-line chart, also known as the candlestick, was originally a tool used by Japanese rice merchants to express the rise and fall of rice prices. It was later introduced to the stock market and gradually became popular in Southeast Asia. K-line charts are very popular among investors for their intuitive and three-dimensional characteristics. Practice has proven that careful study of the K-line chart can more accurately predict the market outlook, and can also more clearly judge the balance of power between the long and short sides, thereby providing an important reference for investment decisions.