To judge the support and resistance well, we should not only look at any index, but also look at various analysis methods. Each technical analysis method should generate its own support resistance signal at every time level such as month, week, day, 4 hours, hour, 30 minutes, 15 minutes.

So this is a lot of values.

The next thing to do is to compare these values, and which ones with high frequency are more effective. This is a judgment;

Then we should refer to some special points, such as a point that can explain the continuation of the trend or the end of the trend or the reversal of the trend. Even if these points appear only once, they are the key support or resistance.

Combining the above information, referring to the current price, and combining with the general one-day fluctuation, we can get the most effective 2-3 supports and resistances today.

This process is the most rigorous. Without screening, you will find that there is a support or resistance every 30 -50 points, which is actually useless. So we need a rigorous process to get the most effective support and resistance today. "