The Gapperz research library
Understand the numbers.Build a clearer routine.
Practical explanations, original tools, and source-reading checklists. Learn the concept, explore an example, and bring it into your research.
10 chapters · Original examples · Source notes
Stock scanner vs. screener
Choose the right tool for a shortlist, a changing market condition, or a specific alert. Start here if you are new to scanning.
Reviewed
Relative volume explained
Use the free RVOL calculator and learn why the time of day changes the comparison.
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How to find stocks to day trade
Turn a session question into a scanner result, a source check, and a useful research list.
Reviewed
Premarket watchlist & template
Download a worksheet and keep the reason, source, observation time, and next check together.
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Bid-ask spread & calculator
Use the spread calculator and a two-price example to compare quoted conditions.
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Dollar volume & calculator
Compare two prices, inspect a two-trade example, and calculate the activity estimate.
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Stock float explained
Understand public trading availability and the evidence a defensible float count needs.
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Float vs. shares outstanding
Match class, date, units, and definitions before combining share-structure fields.
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Short interest vs. short volume
Follow an opened-and-closed position to see why short-sale volume is not short interest.
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Stock dilution & SEC filings
Explore ownership arithmetic and trace an issuance through its disclosed stages.
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Put the research into practice.
Follow a sample scanner result through the chart, source context, and monitoring controls in the public tour.