Support level and pressure level are a reference position reflected by the time-sharing chart and K-line chart of the market. Support level means that when the index moves down to a certain point, the off-exchange funds will buy and change hands with the funds sold on the market, making the index stop falling and rebound at that position. Time-sharing will be shown in the form of a trough, such as the time-sharing chart of Shanghai Composite Index today (June 2020 10):

The yellow line with the most valleys is the reference of the support level of the day.

The pressure level is opposite to the support level. When the index moves up to a certain point, the funds on the market will be sold, which will hedge against the funds bought outside the market, so that the index will stop rising and falling at this position. In time-sharing, it will be displayed in the form of peak value, and the reference of pressure level can be obtained by referring to the multi-day time-sharing chart, as shown in the following figure:

Shanghai Composite Index 6.4-6. 10 five-day time-sharing chart.

As shown in the figure, draw a horizontal line with the sharp points of multiple peaks and valleys. These sharp points are all formed after the funds change hands in the game, so the formed connection has the reference value of trading. Because pressure and support can exchange roles in the game of funds.

The support level formed in a certain period can be the pressure level formed by the rebound after falling, and the pressure level formed in a certain period can be the support level for adjusting and stepping back after breaking through. Last Friday, after testing around 29 10, it was confirmed by support and closed at 2930. After the index opened higher this week, it has been repeatedly testing 2935 points. The time-sharing chart stops falling around 2930 (the starting point of the gap) -2935 (the joint point of multiple valleys and peaks) every time, and then rebounds. This shows that the funds bought near this point are greater than the funds sold, and the original pressure level has become a support level.