A Chinese Stock Screen Using Range, Recent Gains, and Prior-Day Low

Summary

This post describes a Chinese equity screening rule combining a large daily high-low range, at least one strong up day in the recent trading window, and a close above the previous day’s low. The accompanying discussion frames these conditions as filters for volatility, upward price movement, and current price strength. It suggests adding technical indicators, company and industry information, and trading-volume measures for a broader assessment.

The post includes indicator and Python examples, but they do not fully implement the stated screen: the example tests a single-day return rather than searching the full recent window, and some proposed fundamentals and volume conditions are placeholders. It gives no backtest, performance evidence, or precise definition of the range threshold beyond the displayed rule. The author also flags that a large one-day gain may reflect news or speculation, and that price-only filters omit fundamental and policy risks.

Key ideas

• The screen selects stocks with a large intraday range and a close above the previous day’s low.
• It also requires a strong up day within the recent trading period.
• The examples do not fully encode the stated multi-day condition, and some suggested filters remain placeholders.
• The post recommends adding fundamentals, industry context, technical indicators, and trading volume.
• No performance test is provided, and sharp gains may be driven by news or speculation.

Tags

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