Level 5: Building a StrategyInteractive
Stock Scanning & Watchlist Building
22 min readUpdated Mar 2026
The universe of stocks is enormous, with thousands of candidates across multiple exchanges. Systematic scanning narrows that to the best opportunities for your strategy each day.
Filter, Do Not Predict
Scanning filters the universe to find stocks that meet your criteria. It does NOT predict which stocks will go up. The actual entry decision comes later.
Your scanner filters change based on which strategy you trade:
Trend-Following — Uptrending stocks with room to run
Mean-Reversion — Oversold stocks in a long-term uptrend
Breakout — Stocks coiling near resistance
Watchlist Size
Keep your active watchlist to 10-20 stocks maximum. A list of 100 stocks is not a watchlist. It is the entire market.
Key Takeaways
Try This
Go to Finviz.com (or your preferred screener) and set up a basic swing trading scan: Market Cap > $1B, Average Volume > 500K, Price > $10, Price above SMA200. Now add a momentum filter like RSI below 40. Pick the top 5 and add them to a watchlist.
Disclaimer
This educational content is for informational purposes only and does not constitute financial advice. Past performance is not indicative of future results. Trading involves risk of loss. You should consult a qualified financial advisor before making investment decisions. Swingfolio is a trade journaling tool, not a financial advisory service.