Trading tool · Scanner
Build a market scanner that alerts you and never places orders.
A market scanner built with Super Algo Kit watches a defined list of symbols, one completed bar at a time. It checks conditions such as relative volume, range breaks and gaps, ranks the matches and alerts you. It places no orders. The kit grades it N, a tool with no performance claim, judged on correctness, timeliness and alert quality.
strategy facts
Multi-symbol market scanner with ranked alerts
- Kind
- A tool that directs your attention; it places no orders
- Markets
- Equities, ETFs, futures, forex, crypto spot and crypto derivatives
- Timeframes
- 1-minute, 5-minute and daily bars, evaluated only once each bar completes
- Evidence grade
- N: a tool with no performance claim, judged on correctness, timeliness and alert quality
- Status
- Literature: the attention research is published; the scanner is untested by the kit
- Build set
- Scanners and monitors: they read markets and notify without placing orders
- Data needed
- Data licensed for your use, a universe definition, symbol mapping, rate limits and session calendars
From the kit's own card. Not investment advice.
Paper first
Test it before you trade it.
Super Algo Kit runs inside the coding agent you already use. It interviews you, writes the spec with pass marks set first, then builds, backtests and paper-tests. Real money starts only when you type the authorize command.
The plan, step by step
Tick them off as you go.
What is a market scanner and how does it work?
A market scanner watches a defined universe of symbols and checks conditions on each completed bar. Matches are ranked by a declared score and sent to you as alerts. It directs attention; it never places an order.
Research motivates the conditions people ask for. Attention-grabbing stocks draw buying from individual investors, and some studies found a premium after unusually high trading volume. Those findings explain the conditions, but they do not make a scanner's alerts worth trading.
Market scanner rules in plain words
The kit builds the scanner from a few plain parts. Each threshold is declared before testing.
- A point-in-time universe, filtered for liquidity and price.
- Conditions checked on completed bars, in the venue's time zone for session rules.
- A declared ranking score with tie rules and turnover limits.
- One alert per symbol with a cool-down, through a tested channel.
- Polling or streaming that stays inside rate limits at full universe size.
Where a market scanner goes wrong
Most scanner failures are engineering problems. A frozen feed can look connected while sending stale prices, so the kit checks feed health apart from connection health. Conditions computed on unfinished bars repaint: the alert fires, then the condition disappears.
Scale matters too. A scan that runs fine on 20 symbols can fail on 2,000 because of rate limits. Alerts that include redistributed prices can also breach your data licence.
How Super Algo Kit tests a market scanner
Scanners are tested in signal-quality mode, with no performance figures. The outcome is defined before looking, then the kit measures precision, the base rate, lift, false alerts per day and latency. Every threshold change is logged as a trial.
The scan is load-tested at full universe size under the venue's rate limits, and delivery is tested end to end. A dry run then sends live alerts to a test channel and through at least one real delivery path you use.
Before you rely on it
Where it fails.
- Stale data: a delayed or frozen feed makes alerts late or wrong.
- Rate limits: a scan that runs fine on 20 symbols can fail on 2,000.
- Unfinished bars repaint: the alert fires, then the condition vanishes.
- Alert fatigue: too many alerts and you stop reading them.
- Survivorship bias in historical tests of the conditions.
- Data licence breaches when alerts include redistributed prices.
FAQ
Market scanner: questions.
What is a market scanner?
A market scanner checks many symbols against your conditions and alerts you to the matches. The one Super Algo Kit builds evaluates completed bars only, ranks matches by a declared score and places no orders. You decide what to do with each alert.
Can AI build a stock screener for me?
Yes, your AI coding agent can write a stock screener with Super Algo Kit. The kit interviews you, specifies the universe and conditions, then builds and tests the scanner in your own project. It is real code you own, not a hosted app.
Why do scanner alerts repaint?
A scanner alert repaints when it is computed on a bar that has not finished. The condition can be true mid-bar and false at the close, so the alert appears and then vanishes. Super Algo Kit evaluates conditions on completed bars only.
How do you measure whether a market scanner is any good?
Super Algo Kit uses signal-quality mode for a market scanner. It defines the outcome before looking, then reports precision, the base rate, lift, false alerts per day and latency. There are no performance figures, because the scanner places no orders.
Which markets can a market scanner cover?
The scanner card covers equities, ETFs, futures, forex, crypto spot and crypto derivatives. Super Algo Kit reads rate limits and session calendars from the market pack and feed card you use. Check that your data licence allows the use, because redistribution often needs a separate licence.
Keep reading
More guides.
India · Data feedTrueDataSuper Algo Kit helps you use TrueData data for backtesting and paper runs inside your own AI coding agent.
United States · Data feedDatabentoSuper Algo Kit lets you use Databento data for backtesting a bot you build in your own AI coding agent.Sources the kit's card cites
- Gervais, Kaniel and Mingelgrin (2001). The High-Volume Return Premium. Journal of Finance.
- Barber and Odean (2008). All That Glitters: The Effect of Attention and News on the Buying Behavior of Individual and Institutional Investors. Review of Financial Studies.
Build it with Super Algo Kit.
15 specialist roles and 35 skills inside your coding agent. Paper first, live only when you say.
Super Algo Kit is development software. It is not investment advice, a signal service or a promise of performance. Trading involves substantial risk, including the loss of all capital you trade with.