Stock Scanner: Filter & Find Trading Opportunities Fast

What a Stock Scanner Does

A stock scanner filters stocks by criteria — price, volume, momentum, technical indicators, fundamentals — to surface candidates that match your trading strategy. Instead of manually reviewing thousands of tickers, a scanner narrows the universe to a manageable watchlist in seconds.

Stock scanners run either in real time (for day traders) or once per day (for swing traders). Real-time scanners catch intraday setups as they unfold; end-of-day scanners identify overnight holds and position trades. Both serve the same purpose: finding high-probability candidates faster than manual chart scanning.

This guide covers how stock scanners work, best settings for common strategies, and how to avoid false signals. For day-trading-specific workflows, see day trading scanner. For broader screening concepts, see stock screener for day trading.

Types of Stock Scanners

Stock scanners fall into three main categories based on when they run and what they filter:

1. Real-Time Scanners (Intraday)

Run continuously during market hours. Catch volume spikes, breakouts, and reversions as they happen.

Common use cases:

• Day trading momentum breakouts
• Scalping VWAP reversions
• Pre-market gap-and-go setups
• Opening-range breakouts

Best platforms: Trade Ideas, TradingView, Benzinga Pro, Tradewink (AI-powered signals)

Limitation: Speed matters. By the time a stock shows +10%, the easy move may be over. Need fast execution and tight stops.

2. End-of-Day Scanners (Swing Trading)

Run after market close. Identify candidates for next-day entries or multi-day holds.

Common use cases:

• Swing trading setups (breakouts, pullbacks, consolidations)
• Earnings plays (pre-earnings ramp, post-earnings continuation)
• Relative strength plays (stocks outperforming sector or SPY)

Best platforms: Finviz, StockFetcher, TradingView, TC2000

Limitation: By the next morning, overnight news or futures action may invalidate the setup. Always confirm before entry.

3. Fundamental + Technical Scanners

Combine price action with fundamental metrics (earnings growth, revenue, margins, debt).

Common use cases:

• Growth stock screening (revenue growth >20%, gross margin >50%)
• Value investing (P/E <15, P/B <2, positive cash flow)
• Dividend screening (yield >3%, payout ratio <60%)

Best platforms: Finviz (free), Stock Rover (paid), Zacks (paid)

Limitation: Fundamental data lags. A stock may look cheap on trailing P/E but be expensive on forward estimates.

Best Stock Scanner Settings for Common Strategies

Different strategies require different scanner settings:

Momentum Breakout Settings

Goal: Catch stocks breaking to new highs on volume.

Scanner filters:

• New 5-day high (or new 52-week high for swing trades)
• Relative volume >2.5x
• Price >$10 (avoid penny stocks)
• Average volume >1M shares
• Float <200M shares (easier to move)

Entry rule: Wait for pullback to VWAP or consolidation, then enter on reclaim with volume confirmation.

Stop: Below the consolidation low or previous day's close.

Mean Reversion Settings

Goal: Fade extended moves back to VWAP or moving average.

Scanner filters:

• RSI <30 (oversold) or >70 (overbought)
• Distance from VWAP >2 ATRs
• Relative volume >2x (confirmation of exhaustion)
• Price near support/resistance level

Entry rule: Enter when price shows first sign of reversal (volume dry-up, lower high for shorts, higher low for longs).

Stop: Beyond the extreme (new low for longs, new high for shorts).

Swing Trading Breakout Settings

Goal: Find stocks consolidating near resistance, ready to break out.

Scanner filters:

• Consolidation pattern (flat or ascending base)
• Volume dry-up during consolidation (50% below average)
• Price within 5% of 52-week high or previous resistance
• Relative strength >80 (outperforming market)

Entry rule: Enter on volume breakout above resistance. Target 1.5–2x the consolidation range.

Stop: Below the consolidation low.

Earnings Gap Settings

Goal: Catch stocks gapping on earnings, ready to continue.

Scanner filters:

• Gap >5% on earnings announcement
• Pre-market volume >200K shares
• Positive earnings surprise (actual > estimate)
• Relative strength >70

Entry rule: Enter on first pullback to opening range or VWAP after the gap.

Stop: Below the opening range low.

How to Avoid False Signals

Stock scanners surface many candidates, but not all are tradable. Here is how to filter false positives:

1. Check Volume Profile

A scanner may flag a 5% move, but if volume is below average, the move may not be sustainable. Look for relative volume >1.5x as confirmation.

2. Verify the Catalyst

Why is the stock moving? Earnings? News? Sector rotation? No catalyst = higher risk of reversal. Use Benzinga, Finviz news, or Twitter/StockTwits for context.

3. Confirm on Chart

Never blindly enter scan results. Pull up a 5-minute or daily chart, verify the setup, and check for nearby resistance or support levels that may invalidate the trade.

4. Avoid Low Float Traps

Stocks with <5M float can show explosive moves, but liquidity is poor. Slippage and manipulation risk are high. Stick to floats >10M unless you are experienced with low-float setups.

5. Filter Out Penny Stocks

Stocks <$5 have wide spreads, poor liquidity, and higher manipulation risk. For beginners, stick to $10+ unless trading micro accounts.

Best Stock Scanner Platforms

Different platforms excel at different scanner types:

For Real-Time Momentum: Trade Ideas

Trade Ideas is the industry-standard momentum scanner for day traders. Real-time alerts, customizable filters, pre-built strategies, and AI-powered OddsMaker feature.

Pros: Fast, flexible, integrates with most brokers. Cons: Expensive ($118–$228/mo), steep learning curve.

For Chart-Based Scanning: TradingView

TradingView lets you scan based on technical indicators and chart patterns. Free tier includes limited scans; Pro plans unlock real-time alerts.

Pros: Best-in-class charting, global markets, affordable ($12.95–$59.95/mo). Cons: Slower than Trade Ideas for real-time momentum scanning.

For Fundamental + Technical: Finviz

Finviz combines fundamental filters (P/E, revenue growth, margins) with technical filters (RSI, moving averages). Free tier includes delayed data; Elite ($39.50/mo) adds real-time scanning.

Pros: Free tier is powerful, easy to use, clean UI. Cons: Delayed data on free tier, fewer custom alerts than TradingView.

For AI-Powered Signals: Tradewink

Tradewink runs an automated scanning and signal generation pipeline (paper trading only). Surfaces top candidates with entry, stop, target, and written reasoning.

Pros: No manual scanning needed, signals include full trade context, paper-first workflow. Cons: Focused on signal generation, not freeform custom scanning.

How Tradewink Delivers Stock Scanner Results as Signals

Tradewink runs a continuous stock scanning pipeline that combines quantitative filters, technical strategies, and AI conviction scoring:

1. Pre-scan gates: Market regime detection, intraday regime overlay, Monk mode filter.
2. Universe screening: 50+ default tickers + micro account universe + Finviz dynamic sourcing.
3. Strategy evaluation: Momentum, mean reversion, breakout, VWAP, opening-range breakout strategies.
4. AI conviction scoring: Routed LLM evaluates each setup, assigns 0–100 score.
5. Signal generation: Ticker, direction, entry range, stop, target, R:R, confidence, reasoning.
6. Delivery: Discord DM, web dashboard, email, or webhook. Free tier 15-min delayed; Starter+ real-time.

Signals are delivered for review. Acting on them is a separate decision. For the full pipeline, see how AI day trading screeners work.

Start With Free Scanners, Paper Trade, Then Upgrade

Stock scanners save time, but not all scanners are equal. Start with free tiers (Finviz, TradingView, Tradewink), paper trade scan results for 30 days, and upgrade only if the scanner consistently surfaces profitable setups.

Tradewink is research/signals-first and paper-first. AI-powered scanning with entry, stop, target, and reasoning included. Free tier: 3 signals per day, 15-min delayed, no card required.

Create an account to explore AI-powered stock scanning. Review pricing and check currently enabled signals. Tradewink is not a registered investment adviser and does not provide personalized investment advice. Trading involves risk, including loss of capital.