Why Support and Resistance Matter
Stock prices don't move in a vacuum. They tend to pause, reverse, or accelerate at predictable price zones — areas where many buyers or sellers previously transacted. Understanding these zones is the foundation of chart-based trading decisions.
In PaperTrade Academy: Look for these levels on the chart panel before placing any simulated trade. Setting stops just below support (for longs) is a core technique covered in the Stop-Losses lesson.
What Is Support?
Support is a price level where demand is strong enough to halt a price decline and cause a bounce. Think of it as a floor.
Why support forms:
- Buyers who previously wanted to enter at a lower price finally get their chance
- Traders who missed the last rally step in
- Short sellers take profits (buying back shares they sold)
Price action at support:
$55 → $58 → $52 → $55 (support holds) → $62
↑
Support zone
What Is Resistance?
Resistance is a price level where selling pressure is strong enough to halt a price advance and cause a pullback. Think of it as a ceiling.
Why resistance forms:
- Traders who bought earlier and are now break-even want to exit
- Short sellers enter new positions expecting the rally to stall
- Psychological round numbers (e.g., $100, $50) attract sellers
How to Identify Levels
Look for price zones where the chart shows:
- Multiple touches — the more times a level has been tested, the more significant
- Clear reversals — sharp turns up from support, sharp turns down from resistance
- Volume spikes — high volume at a level confirms institutional participation
- Round numbers — $50, $100, $200 act as psychological magnets
The best levels are zones, not exact prices. A "support zone" of $48–$50 is more realistic than a precise line at $49.17.
Role Reversal: Broken Levels Flip
One of the most powerful concepts in technical analysis:
- Broken support becomes resistance — if the stock falls through $50 support, that $50 level often becomes a ceiling on future bounces
- Broken resistance becomes support — if the stock breaks above $75 resistance, $75 often becomes a floor on future pullbacks
Before breakout: $75 = RESISTANCE (stock rejected here)
After breakout: $75 = SUPPORT (stock bounces here on pullbacks)