The system regularly checks market data and looks for unusually rapid declines in individual stocks. Price movement is compared across multiple time periods rather than relying only on the daily percentage change.
When an unusual decline is detected, the system records the event and begins investigating what may have caused the movement.
Relevant public information may include financial news, company announcements, regulatory filings, earnings information, and other publicly available market sources.
Detected events are organized into three general categories to make the cause of a decline easier to understand.
After an event is detected, the system can continue monitoring the stock and its related information. If important new information appears, the classification can be updated rather than treating the initial assessment as permanent.
Allan's Market Lab is an informational and educational project. It does not execute trades, require brokerage credentials, access brokerage accounts, or make investment decisions for users.