In the financial market, combining multiple analytical methods can significantly improve the accuracy of trading. The 123 rule in Dow theory and the 2B buy method, along with the trend divergence analysis of the Chan theory, can greatly increase the success rate of opening positions.

The 2B buying method is more proactive compared to the 123 rule. Although it may provide earlier entry opportunities, it also means a smaller stop-loss space. Therefore, it is crucial to flexibly utilize these two methods and choose and adjust based on specific market conditions.

In mature mainstream markets, these technical analysis methods can help traders achieve stable returns. However, it is worth noting that these methods do not apply to all types of markets. Especially in some highly volatile, less liquid small-cap stocks or emerging assets, the effectiveness of these technical analysis methods may be significantly reduced.

Therefore, when traders apply these analytical methods, they need to carefully select trading targets, focusing on assets that have good liquidity and relatively stable trends. At the same time, continuous learning and practice, along with constant adjustment and optimization of their trading strategies, are essential to achieve long-term stable returns in a complex and ever-changing market environment.