Support and resistance

Support and resistance levels are among the most critical concepts in technical analysis. These price levels represent zones where buying or selling pressure has historically been strong enough to halt or reverse price movement.

What is support?

A support level is a price level where a downtrend is expected to pause or reverse due to a concentration of buying interest. Think of support as a floor beneath the price — each time price approaches this level, buyers step in and push it back up. A level that has been tested and has held several times is watched by more traders, although a level can also give way after many tests.

What is resistance?

Resistance is the opposite of support — it is a price level where an uptrend is expected to stall or reverse because of selling pressure. Resistance acts as a ceiling above the price. When price approaches resistance, sellers typically enter the market, preventing further upward movement.

Horizontal support and resistance

The most straightforward form of support and resistance involves identifying horizontal forex levels where price has repeatedly bounced or reversed. To draw these levels on your chart:

• Identify areas where price has reversed at least twice at a similar level.
• Draw a horizontal line through those swing highs or lows.
• Focus on levels that are clearly visible on higher timeframes (daily, weekly), which more traders watch.
• Treat these levels as zones rather than exact prices, as price may slightly overshoot before reversing.

Trendlines as dynamic levels

Trendlines are diagonal support and resistance levels drawn by connecting a series of higher lows (uptrend) or lower highs (downtrend). A valid trendline requires at least two touch points, with three or more confirming its significance. Trendlines provide dynamic price levels that move with the trend.

Dynamic support and resistance with moving averages

Moving averages serve as dynamic support and resistance levels that adjust as new price data comes in. The 50-period and 200-period moving averages are particularly significant — institutional traders and algorithms frequently reference these levels. In an uptrend, the moving average often acts as dynamic support; in a downtrend, it acts as dynamic resistance.

The polarity principle

One of the most powerful concepts in technical analysis is the polarity principle: once a support level is broken, it often becomes resistance, and vice versa. This role reversal occurs because the price level retains significance in traders' memories. When price breaks through support, traders who were previously buying at that level may now sell, converting the old support into new resistance.

Trading breakouts

A breakout occurs when price decisively moves through a support or resistance level. Successful breakout trading requires confirmation — look for strong candle closes beyond the level, increased volume, and a retest of the broken level. False breakouts are common, so always use stop-loss orders and wait for confirmation before entering.

Understanding support and resistance is the bedrock of technical trading. Combine these levels with candlestick patterns and momentum indicators. Levels are drawn from past prices and are a matter of judgement; they mark where traders are watching, not where price must turn.

Revised 4 October 2026. The statement that a level “becomes stronger” each time it holds was qualified, and the lesson now says that levels are a matter of judgement and do not say where price must turn.