The Big Brother Factor is a technical index invented by Sirius 50 Chen Haoxin, which mainly reflects the influence weight of Big Brother stock in various indexes, such as Big Brother 300 Index, Big Brother 500 Index and Big Brother 1000 Index. Choose different big brother stock pools according to different market conditions. There are two types of markets: aggressive and defensive. Four quantitative stock pools: big brother, big brother value, big brother growth and stability. Six functional areas: scatter plot, stock/fund analysis, return curve, timing function, conditional screening, and stock K-line.