The Gapperz research library
Start with the activity.Know what to read next.
Seven ways to investigate the trading session. Each field guide explains the condition, shows an original example, and connects the result to your research.
07 chapters · Original examples · Source notes
Premarket stock scanner
Find premarket gappers, calculate the move, and turn a busy list into a research routine.
Reviewed
Momentum stock scanner
Read price movement, participation, and day-high proximity as three separate pieces of evidence.
Reviewed
Volume spike scanner
See a sudden change in participation with a six-bucket example and a practical research workflow.
Reviewed
High relative volume scanner
Follow a measured RVOL result through its baseline, volume, quote conditions, and monitoring.
Reviewed
VWAP scanner
Understand observed VWAP crossings, trade versus bar inputs, and the context around a session reference.
Reviewed
Stock halt scanner & LULD
Separate an exchange notice, a price-band condition, and inferred trading silence with a clear state diagram.
Reviewed
Stock news & catalyst scanner
Follow a timestamped example from scanner observation to issuer publication and source review.
Reviewed
Put the research into practice.
Follow a sample scanner result through the chart, source context, and monitoring controls in the public tour.