Support and resistance: the floors and ceilings of the chart

support It is a price area where declines have stopped and reversed in the past — a floor where buyers have shown willingness to act. resistance It is the opposite: a ceiling where rallies have been halted because sellers stepped into action. These are the levels around which most decisions in technical analysis are made.

Why does this work? Collective memory. Whoever bought at a certain level and profited will tend to buy there again; whoever got stuck in a loss near the ceiling will sell "when it comes back." This human behavior repeats itself — turning past levels into present-day decision zones.

How to identify a significant level

• Number of touches: A level the price has reacted to three times is stronger than one touched only once. Each additional reaction adds weight.
• Strength of the reaction: A sharp move away from the level indicates genuine interest; sideways drifting around it — less so.
• Volume on touches: A reaction with high volume = big money was active there. See Trading volume.
• Round numbers (50, 100, 1000$ in Bitcoin) function as psychological levels even without history.
• Age of the level: A level from recent months is more relevant than one that's five years old — but longstanding super-levels (all-time highs) live forever.

Role Swap: Support That Becomes Resistance

One of the most useful principles in technical analysis: A level that gets broken switches roles. Resistance that is broken to the upside becomes support on the next decline (Role Reversal) — those who missed the breakout wait to buy on the return to it, and those who shorted rush to close. This phenomenon is the basis of the "retest" strategy: instead of chasing the breakout, traders wait for the polite return to the broken level.

How to trade around levels — the three rules

• A level is a zone, not a line: The market isn't precise to the agora. Think of a narrow band around the price, especially in volatile assets.
• Buy near support, not near the ceiling: Entering close to support allows for stop Close and reasonable stop below it — a good risk/reward ratio. Buying close to resistance is the opposite of this.
• Define in advance what invalidates the idea: A clear close below support means the floor has broken — the plan is canceled, you exit. No "maybe it'll come back."