A-Share Screen Using Amplitude, Two-Day Highs, and Bollinger Bands

Summary

This Chinese equity screen looks for stocks whose amplitude exceeds 1, whose high equals the highest high over two days, and whose close lies between the Bollinger middle band and upper band. The article supplies indicator formulas and illustrative Python-style logic, then proposes combining the technical conditions with fundamental, industry, and market filters. The setup is a short-term technical selection rule: the amplitude and recent high identify active price movement, while the band position locates the close within a defined volatility envelope.

No backtest results, benchmark, or evidence of predictive performance are provided. The article itself notes that the conditions omit fundamentals and broader market context, and that Bollinger signals can produce false positives. It recommends parameter tuning and broader inputs, but gives no tested settings or validation method. The example therefore communicates a screening concept rather than a fully specified trading strategy; practical use would require clear data conventions, out-of-sample evaluation, and rules for portfolio construction and execution.

Key ideas

• The screen requires amplitude above 1 and a high matching the two-day highest high.
• The closing price must fall between the Bollinger middle and upper bands.
• The article suggests augmenting technical conditions with fundamental, industry, and market inputs.
• It provides no backtest or performance evidence and warns of false signals.
• The sample formulas require platform-specific implementation and validation before use.

Tags

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