A-Share Screen Using Daily Range, an Exact Price, and Prior-Day Low

Summary

This article presents a simple A-share stock screen based on three stated conditions: daily amplitude above one percent, a share price of 18.5 yuan, and a close above the previous day's low. It interprets the range as a measure of price fluctuation and the close relative to the prior low as a basic sign of upward price behavior. The article includes an indicator-formula example and a Python sketch, but the Python logic adds data filters and conditions that differ from the stated screen, including a daily return test; it therefore should not be treated as a faithful implementation.

The document offers no historical test, performance statistics, or evidence that the exact price threshold signals value. It explicitly notes that the rules rely on technical price factors and omit company fundamentals, earnings, and policy conditions. It suggests adding technical and fundamental measures, trading volume, and historical trend analysis, but does not evaluate those additions. The screen is best understood as an illustrative rule set whose thresholds and implementation require validation before use.

Key ideas

• The stated screen requires amplitude above one percent, a price of 18.5 yuan, and a close above the prior day's low.
• The article interprets the range as volatility and the close condition as a simple price-trend filter.
• Its Python example includes additional conditions and does not faithfully implement the described screen.
• No backtest or performance evidence is supplied, and the article warns that fundamental and policy factors are omitted.

Tags

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