Support is a price area where buying has previously been strong enough to stop a decline. Resistance is where selling has been strong enough to stop an advance. That is the definition — but the reason they persist is what makes them tradeable.
Why levels keep mattering
Three separate mechanisms reinforce the same prices, which is why levels work better than they arguably should:
- 1Memory of unfilled orders
Traders who wanted to buy at a level and missed it leave resting orders there. Genuine demand accumulates at a specific price.
- 2Break-even psychology
Traders who bought too high and watched it fall often sell when price returns to their entry. This creates real supply at prior highs.
- 3Shared attention
Everyone is looking at the same obvious highs, lows and round numbers, so orders and stop-losses cluster around them.
Draw zones, not lines
A price level is not a single number. Markets are messy: a level tested three times will produce three slightly different lows. Drawing one thin line and treating it as precise produces two failures — you get stopped out by a one-tick overshoot, or you conclude a level “did not work” because price missed it by a fraction.
What makes a level strong
| Factor | Weak level | Strong level |
|---|---|---|
| Number of touches | One touch | Two to four clean touches |
| Reaction size | Price drifted away | Price reversed sharply and travelled |
| Recency | Two years old | Within the current market context |
| Timeframe | Visible only on 5m | Visible on the daily or weekly |
| Volume | Nothing unusual | A clear volume spike on the reaction |
The flip
When support breaks decisively, it frequently becomes resistance — and vice versa. This is the single most reliable behaviour in the whole topic.
The mechanism is human: buyers who bought at old support are now underwater and want out at break-even; sellers who shorted the break want to add on a retest. Both groups place orders at the same price, in the same direction. The old floor becomes a genuine ceiling.
Practically, the retest of a broken level is often a better entry than the break itself: tighter stop, clearer invalidation, and you avoid the false breaks that punish breakout chasers.
Breaks and false breaks
Not every move through a level is a break. Distinguishing the two is where most of the money is made or lost:
- Genuine break — a decisive close beyond the level, expanding range, higher volume, and price holds beyond it on the retest.
- False break — price pokes through intrabar, wicks back, and closes on the original side. Often on unremarkable volume.
- The trap — a false break that runs far enough to trigger stops before reversing. This is common precisely because stops cluster just beyond obvious levels. Liquidity sits there, and price is drawn to it.
This is why experienced traders often wait for the candle to close beyond a level rather than reacting to the touch. The close is a far better filter than the touch, and it costs you only a little entry price.
Levels worth marking
- Prior swing highs and swing lows on the daily chart
- The high, low and close of the previous day and previous week
- Round numbers — 1.2500, $100, 20,000 — where human orders cluster
- The edges of any obvious multi-week range
- Session opens: where price began the London or New York session