Resistance

Stock trading dictionary: meaning, example and how traders use it.

Last updated: October 17, 2026

Definition: Resistance is a price level on a chart where a stock has repeatedly struggled to rise above because selling pressure increases there. It is the counterpart of support, which acts as a price floor.

How resistance works

Resistance forms where supply has outweighed demand in the past. Investors who bought near a prior peak may sell when the price returns there to break even, and traders who view the level as expensive take profits. Together, these sellers cap the advance. The more times a price has turned back from a level, and the more volume traded there, the more significant traders consider it.

Resistance is a zone rather than an exact price. Many traders mark it around prior highs, round numbers like $100, falling moving averages, or a descending trendline.

Resistance example

Suppose a stock rallies to $75 in March, falls to $66, climbs to $74.80 in May, and slips again. The $74 to $75 area is now resistance. In July the stock pushes to $78 on volume twice its average and closes above $75 for several sessions. That is a breakout. If it later pulls back to $75 and holds, the old resistance has become new support, a pattern known as role reversal.

Support and resistance

Support and resistance are mirror images: support is where buyers have stepped in, resistance is where sellers have. When a stock trades sideways between the two, the range is often called congestion or a trading range. A breakout above resistance or a breakdown below support suggests the balance between buyers and sellers has shifted.

Why resistance levels form

Resistance is ultimately about human behavior and order flow. Investors who bought at a previous peak and watched the stock fall may be eager to sell when they can break even. Traders who shorted near a high may add to positions there. Large institutions sometimes place sell orders around widely watched levels, and round numbers attract limit orders simply because they are easy to remember. When enough sellers cluster in the same area, buyers need extra demand, often visible as heavy volume or positive news, to push through. Once that supply is absorbed, the level loses its power.

Limitations of resistance levels

Resistance is based on past behavior and can fail. Prices sometimes poke above a level and quickly fall back, a false breakout that can trap buyers in a bull trap. Different traders also draw levels differently, so many wait for a close above resistance, rising volume, or a retest before acting. Plotting levels on a clean chart with tools like the Quotelinks chart tool makes them easier to see, but they remain probabilities, not certainties.

Frequently asked questions

How do you identify resistance on a stock chart?

Look for price areas where the stock has repeatedly stalled or reversed lower, such as prior highs, round numbers, falling moving averages, or downward trendlines.

What happens when a stock breaks resistance?

A sustained move above resistance, especially on strong volume, is called a breakout and is often seen as bullish. The former resistance level may then act as support.

Is resistance a good time to sell?

Some traders take profits or tighten stops near resistance because rallies often stall there, but a stock can also break through it, so resistance alone does not determine a sell decision.

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For information only, not investment advice. See the disclaimer.