Field guide / Momentum stock scanner
See the move as it develops.
A momentum stock scanner helps you find price movement and changing participation during the session. Gapperz connects those signals to a chart, symbol research, and alerts in one workspace.
By GapperzUpdated
One stock.
Three questions.
- How far has it moved?
- +12.00%
- $4.48 versus a $4.00 previous close
- Where is it now?
- 0.44%
- Below the $4.50 session high
- How unusual is the activity?
- 3.00×
- 1.2M shares versus a 400K same-time average
- 01Measure the move from a stated reference price.
- 02Compare day-high proximity with the path price took to get there.
- 03Use volume to understand participation, then monitor a clear condition.
Momentum starts with a reference and a time window.
“Moving” becomes useful when you specify the comparison. A stock can be up from yesterday’s close, below its session high, and flat over the last few minutes. Each statement describes a different part of the same session.
A momentum scanner helps separate those views. Price-change rankings show how far names have moved from a reference. High-of-day scanning highlights where price sits relative to the session’s upper range. Volume scanners bring a different question into focus: how much participation is behind the activity?
In Gapperz, you can move between these scanner views and open the same symbol’s chart and research context. That makes it straightforward to investigate a result rather than treating a single ranking as the whole story.
Choose the view that answers your question.
| Scanner | Primary question | Useful next step |
|---|---|---|
| Top % Gainers | Which names have the largest positive percentage change? | Read the stated change basis and inspect the recent chart. |
| HOD Momentum | Which names are near or breaking their session highs? | Check the distance from the high and the recorded break state. |
| High RVOL | Which stocks are unusually active for this time of day? | Compare the volume ratio with absolute shares traded. |
| Volume Spikes | Where has short-window trading activity accelerated? | Locate that burst on the chart and check for new context. |
Start with the question you are trying to answer. A top-gainers list is useful for broad discovery, while a day-high view focuses attention on the current range. High RVOL compares activity with a historical pace; a volume spike focuses on a shorter burst.
Keep those distinctions when comparing platforms. Two scanners with similar names can use different session boundaries, minimum volume, or reference prices. Compare the definitions before comparing their results.
Three measurements make the picture clearer.
Consider the illustrative numbers above: a $4.00 previous close, a $4.50 session high, and a $4.48 current price. The stock is up 12% from the close and 0.44% below the high. Those are compatible observations with different denominators.
| Measurement | Calculation | Result |
|---|---|---|
| Change from previous close | ($4.48 ÷ $4.00 − 1) × 100 | +12.00% |
| Distance below session high | ($4.50 − $4.48) ÷ $4.50 × 100 | 0.44% below the high |
| Relative volume at time | 1,200,000 shares ÷ 400,000 shares | 3.00× the same-time average |
Now change the current price to $4.10 while holding the reference close and high constant. The stock remains up 2.5% for the day, but it is 8.89% below its high. A large earlier move and current strength are separate things to investigate.
Volume adds participation context. A ratio of 3× means activity is three times the chosen baseline; it does not describe direction. Our RVOL guide and calculator explain how the time window changes that reading.
Turn discovery into a monitoring routine.
Choose a scanner for the current research task.
Start with Top % Gainers for broad movement, HOD Momentum for day-high proximity, or High RVOL for unusual participation. Keep the session and timestamps in view.
Inspect the selected symbol.
Read the chart beside the result. Look at the latest move in relation to the day’s range, then review available catalyst and company context. Follow the original source for detail.
Keep the names you want to revisit.
Use a watchlist to collect the results that fit your research process. This gives the session continuity as you switch between scanner views.
Set a specific monitoring condition.
Choose a level or condition that matters to your research and create an alert. The next notification should have a clear reason you can recognize when you return to the workspace.
Keep the context with the result.
A useful session review records the time, the scanner condition, the reference price, and the context visible then. That preserves the question the scanner answered when the name appeared.
Review the chart’s path through the session, including pauses and reversals. When reading a catalyst, distinguish the publication time from the time you first saw it. The public daily archive gives you published reports to explore, and the methodology page explains their evidence labels.
If your session starts before the bell, begin with the premarket scanner guide. It shows how to build the initial list and carry it into the regular session.
A few useful answers.
How is a momentum scanner different from a stock screener?
A screener narrows a universe using selected criteria, such as price or sector. A streaming momentum scanner repeatedly evaluates changing session data. Gapperz combines those jobs: predefined scanner views identify activity, while saved scans and watchlists help organize the names you research.
Does a high-of-day result mean the stock just made a new high?
Read the row’s actual condition. Near a day high and breaking a day high are different states. Gapperz’s HOD Momentum view uses distance from the session high and the recorded day-high break state, so proximity alone should be read as proximity.
Does high RVOL tell me which way price is moving?
RVOL measures trading activity relative to a baseline. Price direction comes from a separate measurement. Read the chart and price change alongside RVOL to understand whether unusual participation accompanies a rise, a decline, or movement within a range.
Can I use Gapperz alongside my existing charts or broker?
Yes. Use Gapperz for discovery, linked research, watchlists, and monitoring. Your broker remains the place where you manage orders. The public tour shows how the research workflow fits together.
Sources & editorial notes
Prepared by Gapperz using our scanner definitions and the primary references below. The examples are illustrative; the public methodology explains how we label data and research context.