Support & resistance

Support is a price zone where a stock has tended to stop falling; resistance is a zone where it has tended to stop rising. Moving averages often act as both.

Support and resistance are price levels where a stock has repeatedly reversed. Support is a floor — a zone where buying has previously emerged to halt declines. Resistance is a ceiling — a zone where selling has previously capped advances. They come from prior highs and lows, round numbers, and widely-watched moving averages such as the 200-day.

These levels are approximate and self-reinforcing: they matter partly because so many traders watch them. A level that holds repeatedly can become significant, and a level that finally breaks can flip roles (old resistance becoming new support, and vice versa).

stocks-llm surfaces stocks sitting on or reclaiming their 200-day average — one of the most-watched support/resistance lines — recomputed nightly. Support and resistance describe past behavior at a price level, not a guarantee it will hold; nothing here is advice.

Stocks near their 200-day support →

See more terms in the stocks-llm glossary.

Informational only — NOT financial advice. This is an educational definition, not a recommendation to buy or sell anything. Metrics on stocks-llm are delayed data and may be missing or stale. Always verify information independently and consult a qualified financial professional before making any investment decision.