What Are Support and Resistance?

Support and resistance are price levels on a chart where buying or selling pressure has historically been strong enough to stall or reverse a move. They are among the most fundamental concepts in technical analysis — and once you learn to spot them, you'll see them everywhere.

  • Support is a price level where buying interest has previously halted a decline. Think of it as a "floor" beneath the market.
  • Resistance is a price level where selling pressure has previously stopped a rally. Think of it as a "ceiling" above the market.

Why Do These Levels Form?

Support and resistance levels form because of collective market memory. When price reaches a level where many traders previously bought, sold, were stopped out, or missed an entry, they are likely to act again at that same level — creating self-fulfilling price reactions. This is why round numbers (e.g., $100, $1,000, 1.2000 in forex) often act as strong levels: they attract attention from a large number of participants.

How to Identify Key Levels on a Chart

Swing Highs and Swing Lows

The most straightforward way to identify levels is to look for previous swing highs (peaks) and swing lows (troughs) on the chart. A swing high that previously acted as resistance may become support once broken — this is called a role reversal, and it's one of the most powerful concepts in technical analysis.

Horizontal Price Zones

Rather than drawing a single precise line, experienced traders often mark a zone around a level, accounting for wicks and minor variations. A level where price has reacted multiple times across different timeframes is considered especially significant.

Round Numbers and Psychological Levels

As mentioned, round numbers attract orders. In forex, levels like 1.1000, 1.2000, or 1.3000 on EUR/USD consistently act as support or resistance. In stocks, levels like $50, $100, or $200 are watched closely by traders and institutions alike.

Trading Support and Resistance: Two Approaches

Bounce Trading

In bounce trading, you look to buy near support (expecting price to bounce upward) or sell near resistance (expecting price to reverse downward). This approach works best when the overall trend is sideways or when the level has been tested multiple times without breaking.

  1. Identify a well-established support or resistance level.
  2. Wait for price to approach the level.
  3. Look for a confirmation signal — a reversal candlestick, a bullish/bearish engulfing pattern, or a divergence on an oscillator.
  4. Enter the trade with a stop placed just beyond the level.

Breakout Trading

Breakout trading involves entering when price decisively moves through a support or resistance level, expecting the move to continue. The key challenge with breakouts is avoiding false breakouts — price briefly piercing a level only to reverse back.

To filter false breakouts, look for:

  • A strong, high-volume candle closing beyond the level.
  • A retest of the broken level (now acting in the opposite role) before entering.
  • Alignment with the broader trend direction.

Dynamic Support and Resistance

Beyond horizontal levels, support and resistance can also be dynamic — meaning they move with price over time. Moving averages (especially the 20, 50, and 200-period MAs) act as dynamic support in uptrends and dynamic resistance in downtrends. Trendlines connecting a series of swing lows (in an uptrend) or swing highs (in a downtrend) serve the same purpose.

Combining Levels for Higher Probability

The most powerful trade setups occur when multiple types of support or resistance converge at the same price zone — for example, a horizontal level, a 50-day moving average, and a trendline all meeting at the same point. Traders call this a confluence zone. The more types of analysis pointing to the same level, the higher the probability that the market will react there.

Key Takeaways

  • Support and resistance are defined by previous price reactions, not drawn arbitrarily.
  • Once broken, support becomes resistance and vice versa.
  • Use zones rather than precise lines to account for market noise.
  • Look for confluence — multiple factors pointing to the same level — for the strongest setups.
  • Always use a stop loss placed just beyond the level to define your risk.