A Short-Term Stock Screen Using Amplitude, Trend Conditions, and Buying Control

Summary

This Chinese stock-selection example combines four conditions: price amplitude above 1, exclusion of ST-designated stocks, a five-session upward condition, and a buying-control measure above 21. The accompanying Python illustration estimates amplitude from the high, low, and previous close; limits selection to before 10 a.m.; checks whether each of five closes is at or above its five-session moving average; and filters on a control-change field. The article interprets the last measure as the share of large-order buying activity.

The document gives no performance results or validation for the screen. It warns that short-term technical filters carry risk and can divert attention from fundamentals, and suggests adding other indicators and fundamental analysis. The code relies on a supplied data file and field definitions that are not explained; the amplitude threshold’s units and the control measure’s construction are also unclear. These conditions describe a candidate screen, not a tested trading strategy.

Key ideas

• The screen combines amplitude, non-ST status, a five-session price trend check, and a buying-control threshold.
• The example limits stock selection to before 10 a.m.
• Its five-session condition counts closes at or above a five-session moving average.
• The article interprets the control measure as large-order buying strength but does not define its calculation.
• No backtest or performance evidence is given, and the article recommends considering fundamentals and market conditions.

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