Support & resistance
The levels where price remembers.
Support and resistance are the horizontal zones where price has repeatedly turned in the past. They are the single most reliable map a trader has of where buyers and sellers are likely to wake up again — and they give you both a reason to enter and a place to be wrong.
Demand below, supply above
Support is a price floor — a zone where buyers have consistently stepped in, soaking up selling and holding price up. Resistance is a ceiling — a zone where sellers consistently appear, capping rallies. Together they frame the box price is currently trading inside.
Why do they form? Memory and orders. Traders remember where price turned before and place orders there again; others who bought too high wait to break even and sell into the same level. Those clustered decisions become self-reinforcing zones.
Zones, not exact lines
A common beginner mistake is drawing support and resistance as a single razor-thin line and then feeling betrayed when price overshoots by a few ticks. Real levels are zones — small bands a few ticks or cents wide. Price will often wick slightly past a level before reversing, sweeping the obvious stops.
Draw your levels through the area where multiple wicks and bodies clustered, not through one exact price. Then expect price to react in the neighbourhood, not at a precise number.
Mark levels through clusters of touches as a zone. Give them a little width so a normal wick-through doesn't shake you out.
Strength, breaks, and flips
The more times a level is tested and holds, the more traders are watching it — which makes it both stronger and, eventually, more fragile. Each test consumes some of the orders defending it. When a level finally breaks on strong momentum, it often breaks decisively.
After a break comes one of the cleanest setups in trading: the flip. Old resistance that breaks tends to become new support, and broken support becomes resistance. Price frequently returns to 'retest' the broken level from the other side before continuing — a high-quality, lower-risk entry because your stop can sit just on the wrong side of the level.
How to actually trade levels
There are two core plays. The reversal: buy as price reaches established support (with a stop just below the zone) or sell at resistance, betting the level holds. The breakout: wait for price to close decisively through a level, then enter on the retest, betting the level has flipped.
Either way, the level gives you a precise, logical place to put your stop — just beyond the zone. If price closes cleanly past it, your thesis is simply wrong and you're out small. That clean invalidation point is what makes support and resistance so powerful for risk control, not just for entries.
- Reversal — buy support / sell resistance, stop just beyond the zone.
- Breakout — enter on a confirmed close through, ideally on the retest.
- Always know your invalidation: where the idea is proven wrong.
Key takeaways
- Support holds price up; resistance caps it.
- Levels are zones, not lines — give them width.
- Strength grows with each test, then breaks can be decisive.
- Broken levels flip roles; the retest is a clean entry.
- Levels give you a logical, precise place for your stop.
Terms in this lesson
- Flip
- When broken support becomes resistance, or vice versa.
- Retest
- Price returning to a broken level to confirm it.
- Invalidation
- The point at which a trade idea is proven wrong.