Defining a 100-Day High Breakout with a 10% Pullback Limit

Summary

This brief Chinese-language forum post asks how to identify stocks that break above a price level and then do not fall more than 10%. It suggests describing the breakout as a new 100-day high: compare the current high with the maximum high over the preceding 100 periods. The discussion does not explain the rolling-maximum operator in detail, and a participant notes that the expression shown belongs to an older platform version.

The post frames the breakout condition as only the first part of the screen. It does not specify how to measure the subsequent drawdown, the time window for checking the 10% limit, or whether the reference price should be the breakout price or a later peak. It also provides no backtest, performance evidence, or guidance on execution. The idea is therefore a starting point for formalizing a rule, not a complete or validated trading strategy.

Key ideas

• A breakout can be represented as the current high exceeding the highest high over the prior 100 periods.
• The stated goal is to find stocks whose decline after breaking a price level stays within 10%.
• The post leaves the drawdown measurement period and reference price undefined.
• The suggested expression is described as belonging to an older platform version.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.