Support is a price level where a stock tends to stop falling. Resistance is where it tends to stop rising. These levels form the foundation of technical analysis.
A stock bounces off $50 three times — that's support. It fails to break above $65 three times — that's resistance.
When support breaks, it often becomes new resistance (and vice versa). Stronger support/resistance levels come from multiple touches over longer timeframes and higher trading volume.
Consider a stock that has bounced off $50 three times over six months — that's a strong support level. Each bounce occurred on above-average volume, confirming institutional buying interest at that price. Meanwhile, the stock has failed to break above $65 four times — a well-established resistance zone.
| Strategy | Entry Trigger | Stop-Loss | Take-Profit |
|---|---|---|---|
| Bounce at Support | Bullish candlestick near support | Below support level | Next resistance zone |
| Rejection at Resistance | Bearish pattern at resistance | Above resistance | Prior support level |
| Breakout Trade | Close beyond level + volume | Opposite side of level | Next key level |
| Role Reversal | Old support acting as resistance | Beyond the level | Measured move target |
💡 Pro Tip: Volume Confirms Levels
A support or resistance level tested on high volume is far more reliable than one touched on low volume. High volume means large institutional orders are defending that price. Combine with moving averages (50-day, 200-day) for dynamic levels that adapt to trends.
1. Drawing levels too precisely. Support and resistance are zones, not exact prices. Expect price to wiggle within 1–3% of the level. Drawing a line at exactly $50.00 and ignoring $49.75 as "close enough" causes missed trades.
2. Trading the level without confirmation. Buying at support before seeing a bullish reversal candle (pin bar, engulfing) is guessing. Wait for price to react first — the confirmation reduces false signals dramatically.
3. Ignoring timeframe context. A resistance level on a 5-minute chart is noise. A resistance level on a weekly chart that has held for two years is meaningful. Always know which timeframe you're trading.
4. Forgetting that broken levels flip roles. When support at $50 breaks convincingly, it becomes resistance. Traders who buy the dip back to $50 (expecting old support) get trapped. This "role reversal" is one of the most reliable concepts in technical analysis.
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Try Position Size Calculator →Do support and resistance levels always hold?
No. They're zones of probable reversal, not guarantees. Strong volume at a level makes it more significant. When a resistance level breaks, it often becomes new support (and vice versa). The more times a level has been tested, the stronger it is — until it finally breaks.
What's a breakout?
A breakout occurs when price moves decisively above resistance or below support, typically on high volume. Breakouts signal a potential trend continuation or reversal. Traders often enter positions on breakouts, placing stop-losses just below the broken level for protection.
Are support/resistance useful for long-term investors?
Marginally. They're primarily short-term trading tools. Long-term investors benefit more from fundamental analysis. However, knowing key levels can help with entry timing — buying near support rather than at resistance can improve your cost basis by 5-10%.