Support and resistance: the complete guide

What they are

A support is an area where falling prices have repeatedly slowed or bounced, because buyers showed up there. A resistance is the reverse: an area where rising prices have stalled, because sellers or profit-taking appeared.

They are zones, not exact lines. Drawing a band that covers the wicks and the closes around a level is more realistic than a single thin line.

How to identify them

• Look for swing highs and lows where the price reversed at least twice.
• Note the number of reactions: a zone tested four times carries more history than one tested once.
• Check higher timeframes, whose levels tend to matter more.
• Add other references: round numbers, previous highs and lows, moving averages.

Breakouts and role reversal

When the price closes decisively beyond a zone, it is called a breakout. A frequent observation is role reversal: a broken resistance can become a support when the price comes back to test it, and vice versa. It is not a rule, only a pattern that is often observed.

False breakouts are common. A move beyond a level that quickly returns inside is sometimes called a fakeout. Confirmation can come from a close beyond the zone, a retest, or higher-than-usual volume.

Why they are not guarantees

A level is only as strong as the participants who remember it. Each test can absorb orders, so a zone tested many times can eventually give way. Levels also fail in fast news-driven moves and in thin markets.

Support and resistance in InvestAI

InvestAI’s price-action analysis lists support and resistance zones and shows how many times the price reacted to each, together with the position of the price in its range. It describes where the market has reacted; it does not say whether it will do so again.