Trading glossary
Support and resistance
By the PatternX team · Published
Definition
Support is a price zone where buying has repeatedly stopped declines, and resistance is a zone where selling has repeatedly capped advances. Both are areas on the chart rather than exact prices.
How it works
Support and resistance appear where many traders made decisions at similar prices. Buyers who missed a bounce at $50 wait for $50 again; holders who bought near an old peak sell when price returns there so they can exit at breakeven. Those clustered orders slow or turn price in the same area more than once.
Common ways to find them:
- Prior turning points: two or more swing highs or lows at about the same level.
- Range edges: the top and bottom of a sideways consolidation.
- Round numbers and old gaps.
- Dynamic levels: a rising trendline or a moving average that price keeps respecting.
A level carries more weight when it has more touches, sharper reactions and heavier volume at the turns. Once it is decisively broken, it often swaps roles: old resistance can become new support. Traders call this polarity, or a role reversal.
Why it matters
Most technical decisions are anchored to these zones. A breakout only means something relative to a level, stops usually sit just beyond one, and targets often sit at the next. The distance between them largely decides your reward-to-risk ratio. They are still only areas of likely reaction; nothing obliges price to respect them.
Example
For example, imagine a coin that turns lower near $2.10 three times in a month, with each peak between $2.08 and $2.12. That $2.08–$2.12 band is resistance. A trader who treats it as a zone would want a close clearly above $2.12, not a brief spike to $2.11, before calling it broken. If the coin later dips back to $2.10 and holds, the old ceiling is acting as a floor.
Common mistakes
- Using one exact price. Stops placed precisely at an obvious level are easy to sweep.
- Assuming a level will hold. Each test absorbs orders, so repeated tests can weaken a level rather than strengthen it.
- Drawing too many lines. If every price is near a level, none of them means much.
How PatternX uses it
In PatternX, support and resistance live inside the pattern rules. A bullish rectangle sets resistance at the mean of at least two swing highs within 1.5% of the latest one, and support the same way from swing lows. An ascending triangle needs a flat top of at least two swing highs within 1.2%, and its breakout must close 0.1% beyond that level. The two peaks of a double top must match within 2.5%.