The betting methods of "two-color ball" can be divided into self-selected number betting and machine-selected number betting; Its betting methods include single betting and double betting. Single bet is to select 6 numbers from the red ball number and 1 number from the blue ball number to form a betting number.
(1) Multiple red ball numbers: Choose 7-20 numbers from red ball numbers and 1 number from blue ball numbers to form a bet with multiple betting numbers. (2) Multiple numbers of the blue ball: 6 numbers are selected from the red ball numbers and 2- 16 numbers are selected from the blue ball numbers to form a bet with multiple betting numbers. (3) Full-duplex: select 7-20 numbers from the red ball number and 2- 16 numbers from the blue ball number to form a multi-bet number. Analyzing the number trend, taking the two-color ball as an example, the number trend of the last five issues is generally called the recent trend, the number trend of 10 is called the medium-term trend, and the number trend of the 50 issues is called the long-term trend; The trend of a lottery number is called the overall trend. Because hot codes generally consist of duplicate codes, duplicate codes are excluded first: the next duplicate code generally has the ratio of 1-3. According to the trend of numbers, the other five numbers can be excluded, and the remaining three numbers are used as alternatives. The choice of duplicate codes mainly depends on trends and historical data. Excluding cold codes: according to the proportion and number trend of the first phase with at most two cold codes, the remaining cold codes can be excluded. The choice of cold code mainly considers the factors of duplicate code, duplicate code and parity.