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Support & resistance

support, resistance, key levels

Support is a price area where buyers were recently strong enough to stop a decline. Resistance is an area where sellers stopped a rise. The more often a level holds, the more market participants watch it.

In the screenerThe screener calculates support and resistance as the low and high of the last 50 trading days and uses them in its analysis.

How to find support and resistance

Treat levels as zones, not exact lines. A stock can dip a little below support intraday and still close above it.

Price bounces between a support zone and a resistance zone; after the breakout, the old resistance acts as support.
Price bounces between a support zone and a resistance zone; after the breakout, the old resistance acts as support. Tap to enlarge

How traders use them

Support below the entry is a natural place for the stop, resistance above it a first target. When a level breaks with strong volume, it often switches roles, see breakout and pullback.

Frequently asked questions

How strong is a support level?

It gets stronger the more often it held, the higher the volume at that level and the more visible it is, for example a round number or a multi-month low.

What happens when support breaks?

Often the selling accelerates, and the old support later acts as resistance when price returns to it.

See it in the screener

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Related terms

All terms in the options glossary → · Methodology →