1. Futures shock refers to the repeated consolidation and fluctuation of futures within a certain range. The main force can take this opportunity to wash dishes, shake positions and repair the K-line chart, with the purpose of preparing for the next operation, which is a trading technique commonly used by the main force.

2. The performance of the shock index is an index whose value fluctuates up and down between set horizontal values or around a central line. The shock can remain at an extreme level for a long time (oversold and overbought), but it will not keep the trend and the direction will remain unchanged.

3. The shock indicators mainly include random indicators and relative strength indicators. By comparing the prices at two specific time points, we can judge whether the market development is accumulating kinetic energy or losing kinetic energy. Once the shock indicator enters the oversold or overbought area, the original trend may stop or reverse.