Support is a price level where buyers consistently step in and stop a decline; resistance is where sellers consistently cap a rally. These levels form at prior highs and lows, round numbers ($50, $100, $200), and Fibonacci levels. The most important rule: when support breaks, it becomes resistance — and vice versa. The more times a level has been tested without breaking, the more significant the eventual breakout or breakdown will be.
Support and Resistance Explained — The Foundation of Price Structure
Every trade you make is based on price structure — even when you don't realize it. Support is where buyers have historically stepped in. Resistance is where sellers have dominated. Understanding these levels isn't a trading strategy — it's the prerequisite for every strategy.
What are Support and Resistance?
A price level where demand has historically exceeded supply — buyers have stepped in and stopped a decline. When price falls to a support level and bounces, it confirms that buyers are willing to defend that price.
A price level where supply has historically exceeded demand — sellers have stepped in and capped a rally. When price rises to a resistance level and reverses, it confirms that sellers are willing to sell at that price.
Why do these levels repeat? Because of memory. Traders who bought at $100 and watched the stock fall to $80 will sell the moment they get back to $100 (breaking even). Traders who missed buying at $80 will buy again when price returns. These collective behaviors repeat, making price levels self-fulfilling.
5 Rules for Valid Support and Resistance Levels
Role Reversal — The Most Powerful Concept
When a support level breaks, it becomes resistance. When a resistance level breaks, it becomes support. This is called role reversal — and it's one of the most reliable phenomena in all of technical analysis.
Example: NVDA had resistance at $500. When it broke above $500, $500 became support. On the next pullback, institutional buyers who missed the breakout buy at $500 (their prior resistance is now a discount). This creates the bounce that makes the old resistance the new support.
Types of Support and Resistance
How to Trade Support and Resistance
Frequently Asked Questions
Should I use exact prices or zones for support and resistance?
Zones are more accurate than exact prices. Markets are not precise — price can pierce a support level by 1-2% and then recover, which is still a valid bounce. Draw support and resistance as zones 0.5-2% wide rather than exact lines. The zone represents where institutional orders cluster, and those orders aren't all sitting at the exact same price.
What happens when support breaks?
A broken support level has three implications: (1) the buyers who defended it previously are now trapped — they're long and underwater, creating potential selling pressure on any recovery; (2) the level now becomes resistance due to role reversal; (3) stop-loss orders below support trigger, accelerating the decline. This is why breaks of major support levels often happen quickly — a cascading effect of stops and trapped longs.
How many support and resistance levels should I track?
Less is more. Focus on the 2-3 most significant levels on each side of the current price. Too many lines on a chart create confusion. The key levels are: the immediate support just below the current price, the next major support below that, the immediate resistance above, and any all-time high or historical significant level near price.
APEX identifies key support and resistance automatically
Price relative to key levels + volume confirmation + RSI at support = high-probability setup. Run a full analysis in 60 seconds.
Analyze a Stock Free →