Support and Resistance
What Are Support and Resistance?
Support and resistance are key concepts in technical analysis representing price levels on a chart where the asset's price tends to stop and reverse due to a concentration of demand (buying) or supply (selling).
Think of support as the "floor" and resistance as the "ceiling." **Support:** A price level below the current market price where buying interest is strong enough to overcome selling pressure. As the price drops towards support, it gets cheaper, buyers step in, and sellers stop selling, causing the price to bounce back up. **Resistance:** A price level above the current market price where selling pressure is strong enough to overcome buying pressure. As the price rises towards resistance, holders are eager to sell (take profit) and buyers are reluctant to buy at high prices, causing the price to retreat.
Key Takeaways
- Support is a price level where a downtrend tends to pause due to buying interest.
- Resistance is a price level where an uptrend tends to pause due to selling interest.
- When a support level is broken, it often becomes a future resistance level (polarity swap).
- When a resistance level is broken, it often becomes a future support level.
- These levels are psychological barriers based on trader memory and order flow.
Identifying Levels
Traders look for:
- Historical Turning Points: Places where price has reversed multiple times in the past.
- Round Numbers: Psychological levels like $100 or $50 often act as support/resistance.
- Moving Averages: Dynamic support (in an uptrend) or resistance (in a downtrend).
- Trendlines: Diagonal lines connecting higher lows (support) or lower highs (resistance).
The Polarity Swap (Role Reversal)
A key concept is that once a level is decisively broken, its role flips. * **Resistance becomes Support:** If price breaks above a $100 resistance ceiling, $100 often becomes the new floor. Why? Traders who sold at $100 regret it and want to buy back if it returns to their entry price. Traders who missed the breakout wait for a pullback to $100 to enter. * **Support becomes Resistance:** If price breaks below a $50 floor, $50 often becomes a new ceiling. Traders who bought at $50 are now losing money and are desperate to sell at break-even if the price rallies back to $50.
Real-World Example: Trading the Breakout
Stock XYZ has been bouncing between $40 (Support) and $50 (Resistance) for months. Scenario: Price rallies to $50 and smashes through on high volume, closing at $52.
Important Considerations
Support and resistance are zones, not exact lines. Price often dips slightly below support (a "fakeout") before reversing up. Traders use "zones" of support (e.g., $49.50 - $50.50) rather than a single penny price point to avoid getting stopped out prematurely.
FAQs
Connect the major highs (resistance) and major lows (support) on your chart. The more times the price has touched a line without breaking it, the stronger that level is considered to be.
Human psychology. People place limit orders at obvious round numbers like $100.00 rather than $101.37. The clustering of orders at these levels creates natural supply and demand barriers.
Unlike a horizontal line which is fixed, dynamic support moves with time. Common examples are Moving Averages (like the 50-day MA) or Bollinger Bands, which provide support in a trending market.
Yes. A breakout through resistance on high volume is much more likely to be real. A breakout on low volume is often a trap (fakeout) and the price will likely fall back into the range.
Yes. Multi-year highs (e.g., the 2000 dot-com peak for Nasdaq) can act as formidable resistance even decades later because they represent significant psychological milestones for the market.
The Bottom Line
Support and resistance are the vocabulary of the market. They tell the story of the battle between buyers and sellers. By identifying these levels, traders can define their risk (place stops) and identify their reward (set targets). Whether you are a day trader or a long-term investor, respecting these invisible barriers is crucial to timing your entries and exits effectively.
Related Terms
More in Technical Analysis
At a Glance
Key Takeaways
- Support is a price level where a downtrend tends to pause due to buying interest.
- Resistance is a price level where an uptrend tends to pause due to selling interest.
- When a support level is broken, it often becomes a future resistance level (polarity swap).
- When a resistance level is broken, it often becomes a future support level.