Most retail traders find stocks to trade through social media — someone on Twitter or Reddit mentions a ticker and they pile in. This is not a strategy. It is random noise with a social proof veneer. A systematic screening and scanning process finds tradeable setups before they become crowded, and it does so consistently — not just when the algorithm feeds you the right post.
Direct Answer
Stock screening uses fundamental and technical filters to narrow the universe of stocks down to a manageable watchlist (20-50 names). Scanning applies real-time technical criteria to that watchlist to identify stocks that are setting up or triggering right now. Screening is done weekly. Scanning is done daily (or intraday).
The three components: (1) a screener to build the universe (filter for volume, price range, market cap, and sector), (2) a scanner to find today's setups (technical criteria like breakouts, moving average crossovers, volume spikes), and (3) a watchlist to track the stocks that pass both filters. Most profitable traders trade the same 20-50 stocks repeatedly because they know how those stocks behave.
Step 1: The Screener — Narrowing the Universe
Start by eliminating stocks you should never trade: anything under $5 (penny stocks — manipulated, wide spreads, no institutional interest), anything with average daily volume under 500,000 shares (too illiquid — you cannot exit quickly), and anything with a market cap under $300M (micro-caps with erratic behavior). These three filters alone eliminate 80% of listed stocks and save you from the biggest source of retail losses.
What to keep: stocks priced $10-500, average daily volume over 1 million shares, market cap over $2 billion. This gives you liquid, institutional-grade stocks where your order does not move the price and spreads are tight. If you are day trading, tighten the volume filter to 3M+ average daily volume.
Sector focus helps. If you trade tech stocks, build a watchlist of 30-50 tech names that you follow daily. Learning how NVDA, AAPL, MSFT, AMD, AMZN, and META behave — their typical daily ranges, how they react to earnings, where they find support — is more valuable than scanning every sector for random tickers. Specialists outperform generalists in trading.
Free screeners: Finviz.com (the gold standard for free screening — filter by price, volume, market cap, sector, and dozens of technical/fundamental criteria), TradingView screener (integrated with charting), Yahoo Finance screener, and your broker's built-in screener (Thinkorswim, Webull, and Interactive Brokers all have screeners).
Step 2: The Scanner — Finding Today's Setups
A scanner applies real-time technical criteria to your watchlist (or the full market) and alerts you when a stock meets them. Unlike a screener (which filters a static snapshot), a scanner runs continuously and catches setups as they develop.
Scan criteria that surface quality setups:
**Volume spike:** current volume is 2x+ the 20-day average volume. A volume spike means institutional money is moving — something is happening that is worth paying attention to. Filter for stocks where the volume spike is accompanied by price movement (up or down) rather than just unusual options activity.
**52-week high breakout:** stocks making new 52-week highs are in strong uptrends. Buying strength (breakouts to new highs) has historically outperformed buying weakness (dips in downtrends). Filter for stocks making 52-week highs on above-average volume for confirmation.
**Moving average crossover:** the 9 EMA crossing above the 21 EMA on the daily chart is a simple momentum signal. It indicates the short-term trend is accelerating. This is a setup signal (put the stock on your radar), not a buy signal (wait for a specific entry trigger like a pullback to the 9 EMA).
**Consolidation breakout:** stocks that have been trading in a tight range for 5+ days and suddenly expand. The breakout from consolidation — especially on volume — is one of the highest-probability setups because the compressed range represents a balance between buyers and sellers that has just resolved.
Charted acts as a pattern scanner for any chart you screenshot — it identifies the current pattern, key levels, and potential entry/exit points. It is especially useful for validating what a scanner surfaces: the scanner says "volume spike on XYZ" and Charted shows you whether the chart setup supports a trade.
Step 3: The Watchlist — Your Trading Universe
The watchlist is your curated list of stocks that you actively monitor. It should be 20-50 names that you update weekly (add new screener results, remove stocks that no longer meet your criteria).
Organize the watchlist into tiers: **Active setups** (stocks that are at or near an entry point — these get daily chart review), **Developing** (stocks that are building a pattern but not ready yet — check 2-3 times per week), and **On radar** (stocks that passed the screener but have not formed a setup yet — weekly review).
The weekly routine: every Sunday evening, spend 30 minutes reviewing your watchlist. Update the tiers. Remove stocks that have moved away from your entry zone or broken down technically. Add 3-5 new names from the screener. Read through the weekly charts (not daily — the weekly chart shows the big picture that daily noise obscures). This 30-minute review is the foundation of your entire trading week — it tells you what to watch for on Monday morning.
The daily routine: every morning before the market opens (30 minutes), scan your Active setups tier for any stock that is gapping or showing pre-market volume. Check the overnight futures to understand the market's general direction. Identify 2-3 specific setups you will act on if they trigger. Write them down with the entry, stop, and target before the market opens — not after you are in the trade.
Charted streamlines this process: screenshot your watchlist charts, and it identifies which stocks have active patterns, which are developing, and which do not have setups. It replaces the manual chart-by-chart review with a visual assessment that takes seconds per chart.
Common Screening Mistakes
**Too many criteria:** a screener with 15 filters returns zero results. Start with 3-5 core filters (price, volume, market cap + one or two technical criteria) and add complexity only when you have too many results to manage.
**Scanning for perfection:** no setup will match every criterion perfectly. A stock that meets 4 of 5 criteria is worth watching. A stock that meets all 5 may have already moved. The scan surfaces candidates — your chart analysis and judgment determine which ones are tradeable.
**Ignoring the overall market:** even the best individual stock setup fails if the broad market is in a downtrend. Check SPY before trading individual names. If SPY is below its 20-day moving average and making lower lows, be cautious with long trades — most stocks follow the market's direction regardless of their individual patterns.
*This content is for educational purposes only and does not constitute financial advice. Trading involves significant risk of loss.*