Polling a Real-Time Stock Screener for Intraday Candidates

Summary

This tutorial demonstrates repeatedly querying a stock-screening service for the twenty stocks currently ranked highest by popularity, printing the returned stock codes with a timestamp, and waiting three seconds before querying again. It presents a minimal polling pattern for observing changing screen results during the trading session. The example is framed as running in a research environment, and it does not provide entry rules, portfolio construction, order handling, or a test of trading performance.

A reader comment supplies a key limitation: the particular popularity query may return the previous day’s data during market hours. Other commenters report mismatches between backtest transaction records and the securities shown by the service, and raise questions about applying results to live trading. These reports suggest that query timing, data freshness, and consistency between research and execution environments need to be checked before using screen output in a strategy. The post is therefore a small data-access example rather than a validated intraday selection method.

Key ideas

• The example polls a popularity-based stock query and prints its results with timestamps.
• It pauses three seconds between requests to retrieve updated screening output.
• The post does not define trading rules or demonstrate that the screen predicts returns.
• A commenter warns that the query may show the prior day’s popularity data during the session.
• Comments also describe differences between backtest trades and the screener’s displayed selections.

Tags

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