Why it matters
Why resistance matters to traders
Resistance can help define structure, potential targets and invalidation. It also identifies areas where breakout traders and mean-reversion traders may make very different decisions, which can increase activity around the level.
Practical use
How traders use it
Common reference points include swing highs, range tops, prior support after a breakdown and prominent historical reactions. Traders normally combine the area with trend, momentum, timeframe and the behaviour of price on return.
Common mistake
What to avoid
Assuming a level becomes stronger simply because it has been touched many times can be dangerous. Repeated tests may demonstrate interest, but they may also absorb available orders and prepare the level for a break.
Use the concept, not the label
Trading terminology is useful only when it improves a repeatable process. Define the concept clearly, test how you use it, pair it with risk management, and avoid turning chart language into certainty about what the market must do next.