What Are Support and Resistance?
Support is a price level where buying interest has historically been strong enough to stop a decline and push prices back up. Resistance is the opposite: a level where selling pressure has historically capped rallies.
These levels exist because of human memory and psychology. Traders who bought at $50 and watched the stock fall to $45 will sell when it returns to $50 just to break even. This collective behavior creates the self-reinforcing dynamics that make support and resistance work.
How to Identify Key Levels
Previous Highs and Lows
The most reliable support and resistance levels are simply previous swing highs and lows. A price level that rejected multiple times in the past will often do so again. Look for levels that have been tested and respected at least twice — the more touches, the stronger the zone.
Round Numbers
Humans are drawn to round numbers. $100, $150, $200, $500 — these levels act as psychological anchors. You will see significant support and resistance at major round numbers on any large-cap stock or index.
VWAP (Volume Weighted Average Price)
The VWAP is the average price weighted by volume over a given period. Institutional algorithms use it as a benchmark. Price tends to gravitate toward VWAP and respect it as both support and resistance.
Moving Averages
The 20-day, 50-day, and 200-day moving averages are watched by millions of traders. The 200-day MA is particularly significant — a break below it is often treated as a major bearish signal; a reclaim of it as bullish.
Market Structure: Trend Reading
A uptrend is characterized by higher highs (HH) and higher lows (HL). A downtrend is characterized by lower highs (LH) and lower lows (LL). When an uptrend fails to make a new high and instead breaks the most recent higher low, this is a structure break — an early warning that the trend may be reversing.
Support Becomes Resistance (and Vice Versa)
When a support level is broken convincingly, it often becomes resistance on the next bounce. This is called role reversal. A stock that was supported at $50 for months, breaks below it, and then rallies back to $50 — that $50 level will frequently act as new resistance.
The more times a level has been tested and held, the more significant its eventual break. A support level is not stronger for holding many times — it is more significant because a break of it will shake out more trapped traders and accelerate the move.
Practical Application
Before every trade, identify the nearest support level below your entry (this is your stop area) and the nearest resistance above (this is your target). If the distance to resistance is less than the distance to support, your risk/reward is unfavorable — pass on the trade.
This simple exercise — measuring the distance between where you are wrong and where you are right — will improve your win rate and your average win-size immediately.