Build Your Ultimate Low Float Penny Stocks Scanner

Settings, Safeguards, and Real Examples

You want a tool that spots tiny floats before they move. You also want guardrails. That mix is the whole game. In this guide you will build a low float penny stocks scanner that filters noise and leaves a short, tradable list. We will pair crisp rules with quick examples you can picture, like a tape speeding up while your hand grips a warm mug beside the keyboard.

Table of Contents:

The case for targeting float, not rumor
Core settings that make your list tight
Why each setting matters
Build your low float penny stocks scanner step by step
Read the tape like a mechanic
Two miniature case studies
Where to get reliable inputs
Risk controls that keep you in the game
A simple daily workflow
Pitfalls to avoid
Putting it together
Citations

First, a shared language helps. Public float is the portion of shares available for trading by the public, not the restricted blocks held by insiders or controlling holders.¹ A lower float means fewer shares can meet a sudden wave of orders, which often leads to sharp price moves when volume spikes. In the U.S., the term penny stock generally covers securities priced under 5 dollars that do not meet the exclusions in Rule 3a51-1.² Those facts frame why scanners that target tiny floats tend to surface the wild movers you see on social feeds and in chat rooms.

The case for targeting float, not rumor

If you have ever watched a one-dollar stock jump twenty percent on a thin tape, you have seen float in action. Fewer shares in the pool mean each market order can push the price more. That is not theory. It is simple supply meeting a burst of demand. Your low float penny stocks scanner focuses on that structural feature instead of chasing stories that change by the hour.

Core settings that make your list tight

Start with a small, focused ruleset. Keep the list tight and readable.

Price filter: $0.25 – $5.00 to capture the penny-stock range while skipping sub-penny noise.
Float filter: under 10 million shares to start; tighten to under 5 million on busy mornings.
Relative volume: at least 2 × the 30-day average by mid-session.
Dollar volume: over $1 million so spreads are sane.
Exchange: show Nasdaq and NYSE first for cleaner data.
Short sale restriction context: flag stocks that have triggered Rule 201 so you adjust order types.
LULD status: show whether the symbol is near limit bands to avoid chasing halts.

These core rules define a low float penny stocks scanner that respects liquidity and execution realities.

Why each setting matters

Price sets your sandbox. Under $5 you will see micro-caps and small-caps that can double in a week, then give it back in a day. That is the playground you chose… even within your low float penny stocks scanner.

The float cap focuses on supply—picture a crowded room where only a handful of chairs remain. The moment music stops, people scramble. Markets behave the same way when news hits and the float is tiny.

Relative volume confirms that today is different from the recent past. Two times average by mid-session tells you that traders care, not just algorithms pinging quotes. Dollar volume matters because you need fills that do not slip a nickel per click. Big prints smooth the path for partial exits. Exchange choice improves data quality and reduces broken prints that can poison a watchlist.

Short sale restriction changes execution. Rule 201 kicks in after a ten percent drop from the prior close.³ When active, new shorts must be entered above the current national best bid. If your symbol flips into that state, hitting bids will not work for short entries. You need to plan around that rule.

LULD bands serve a different role. They pause trading when a stock runs outside a dynamic price band so that new orders can refresh the book.⁴ If a symbol is skirting its upper band, you risk getting stuck in a halt as everyone piles in late.

Build your low float penny stocks scanner step by step

You can wire these filters in nearly any platform. The ingredients stay the same. Apply them in this order for a clean, stable list that updates as liquidity changes.

Universe. Start with U.S. common stocks and ETFs excluded. Add a simple price rule between $0.25 and $5.00. That keeps symbols consistent with the penny-stock definition and avoids thin tickers with no tape.
Float. Filter under 10 million shares. Keep a second view under 5 million for a tighter, more explosive set. This one rule gives your low float penny stocks scanner its edge.
Liquidity. Add relative volume over 2 by 11 a.m., plus dollar volume over $1 million by noon. Liquidity protects you from chasing prints in an empty book and improves your odds of exiting with grace instead of panic.
Trend. Require today’s high to be at least 3 percent above the open. That small hurdle filters dead money and helps you spot names with real buyers in the tape.
Volatility sanity. Exclude average true range above $1.50 if you hate slippage. If you enjoy fast action, skip that rule. The setting is for temperament, not virtue.
Compliance context. Add a flag for Rule 201 status and a flag for current LULD state. Those flags do not block a symbol—they simply change how you plan a trade. Your low float penny stocks scanner becomes both a filter and a coach.

Read the tape like a mechanic

Once the list is short, the work shifts to reading. Watch how bids refresh after a pullback. Count how many times a level holds in the time it takes coffee to cool. If the float is tiny and prints are thickening, momentum can return with a single sweep. If spreads keep widening, step back—a quiet book often hints that the last buyers have already acted.

Two miniature case studies

Case A. News hits a three-dollar biotech at 9:45 a.m. Float is 4.8 million. Relative volume jumps to 3 by 10:15. Dollar volume crosses $20 million by lunch. Your low float penny stocks scanner highlights the symbol in the top three. You do not chase the first spike. You wait for a clean pullback that holds above the morning breakout. When the bids refill twice and the tape prints steady blocks, you scale in with a starter. Risk is the prior low plus a small buffer. The stock grinds higher in ten-cent steps while you scale out on strength.

Case B. A one-dollar clean-energy name with 7 million float gaps up on chatter. Relative volume reads 1.6 by 11:30. LULD indicator shows two recent pauses. Rule 201 trips after a sharp fade. Your low float penny stocks scanner keeps the ticker on the list, but the context turns red. You pass on longs into halts. You also skip shorts at the bid due to the restriction. The afternoon bleeds lower with sloppy spreads. Your plan saved you from a guessing contest.

Where to get reliable inputs

Float figures update after secondary offerings, lock-up expirations, or big insider sales. Pull float from a primary source when possible. Company filings and the latest annual report offer the most precise view of restricted shares. For daily trading rules, lean on exchange portals that publish LULD status and on regulator pages that describe short sale restrictions. Your low float penny stocks scanner is only as good as the inputs you feed it.

Risk controls that keep you in the game

Use these habits to balance speed with survival.

Hard stop on every position, even if mental at entry, and respect it after partial exits.
Max loss per day and per ticker set in writing, with alerts that pop up before the threshold.
Position size tied to average true range and your account.
No adding if spreads are widening in real time.
No holding through halts unless the plan is written in advance.

These rules are boring. They also keep your playbook intact for next week.

A simple daily workflow

Morning prep sets the tone. Run your scan 15 minutes before the open. Tag symbols with news and with floats under 5 million. After the first halt cycle of the day, refresh the list. Midday, prune any name that fails to hold relative volume above 1.5. Into the close, switch the relative-volume rule to the full-session value and keep only dollar volume over $3 million. That last pass finds liquid candidates for next-day continuation. Through all of it, your low float penny stocks scanner stays focused on float, liquidity, and structure.

Pitfalls to avoid

Three traps catch many traders who love tiny floats. First, they widen stops after a quick flush and turn a small loss into a fight. Second, they add size into halts without a plan and wake to a gap that ruins a month. Third, they forget that sectors rotate. What worked for a low-float healthcare name last week may not apply to an obscure miner today. Your map must shift with the tape.

Putting it together

You now have a focused checklist, a clean filter set, and a way to read the screen without guessing. Build the tool. Treat it like a spotlight, not a crystal ball. When you see the right blend of float, volume, and structure, act with purpose. When the book looks ragged, protect your capital and let someone else chase. That balance helps you last.

Citations

SEC eCFR. Definition of “penny stock” under Rule 3a51-1. https://www.ecfr.gov/current/title-17/chapter-II/part-240/subpart-A/subject-group-ECFR48fbd3224bf6573/section-240.3a51-1
SEC Division of Trading and Markets. Responses to Frequently Asked Questions about Rule 201 (Alternative Uptick Rule). https://www.sec.gov/rules-regulations/staff-guidance/trading-markets-frequently-asked-questions-7
Limit Up-Limit Down Plan website. Overview of LULD price bands and halts. https://www.luldplan.com/
Legal Information Institute. Public float definition. https://www.law.cornell.edu/wex/public_float

Online Penny Stock Trading