What does Support & Resistance mean?

Support is a price level where buyers tend to step in (a floor); resistance is where sellers tend to appear (a ceiling).

Support is a price level where buyers tend to step in (the floor). Resistance is where sellers tend to appear (the ceiling). When price breaks resistance, it often becomes new support — and vice versa.

Support & Resistance example

A stock bounces off $45 three times in two months — buyers keep stepping in there, so $45 is support. If it later breaks below $45 on heavy volume, that old floor often becomes a ceiling on the way back up.

Common beginner mistake

Treating support as a guarantee. It's a level where buyers showed up before, not a promise they'll show up again.