A Chinese Stock Screen for Large Swings, Afternoon Inflows, and Reversal Bars

Summary

This stock-selection recipe combines three conditions: daily amplitude above 1%, afternoon large-order net inflow, and a bullish reversal bar in which the close is above the open and the open is above the previous close. The document gives formula-style definitions for these conditions and a Python example that retrieves daily stock data, filters for selected exchange-code prefixes, and checks price and volume-related measures.

The method is described as a preliminary screen, not a complete investment decision. The author recommends further review of company finances and operating prospects, along with risk controls and diversified allocation. The article warns that the simple indicators may misidentify future price direction, omit stronger candidates, and become counterproductive if pursued without a broader plan. It offers no backtest, benchmark comparison, or evidence of predictive performance. The code’s use of daily data also does not clearly establish how its calculation isolates afternoon flows, so that condition may require additional data and validation before implementation.

Key ideas

• The screen requires daily price amplitude above 1%, afternoon large-order net inflow, and a bullish reversal bar.
• The reversal condition compares the current close and open with the prior close.
• The article provides formula examples and a Python workflow for screening stocks.
• It recommends evaluating company fundamentals and managing risk after the initial screen.
• No evidence of backtested performance is presented, and the code does not clearly isolate afternoon activity.

Tags

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