01Why everyone sees a different support
A support is a price where declines have stalled several times. Put like that it sounds objective, but it hides three decisions people make without noticing: what counts as a turn, how far apart two turns can be and still be the same level, and how many times it has to repeat.
Look at two years of chart and you see the big turns; look at three months and you see the small ones. Allow two dollars of slack and you merge levels that someone allowing one keeps apart. Nobody is wrong: they just never fixed the rules.
02Rule one: the turn has to be on a bar
A touch is the high or the low of a specific bar, with its date, not a point that looks close enough. And not every wiggle counts: it has to be a real turn, a move large enough not to be noise.
How large depends on the asset. A dollar is a lot for a ten-dollar stock and nothing for a five-hundred-dollar one. So the sensible yardstick is the asset's own volatility, measured as the average range of one bar (the ATR): a turn counts when price has moved several times that range before reversing.
03Rule two: a level is a band, and it has to repeat
Turns almost never land on the same cent. Grouping them needs a tolerance, and that tolerance is also measured in volatility: half an average bar range is a common figure. When the turns spread over a wider band, the honest thing is to call it a zone, not a line.
One turn is not a level. It takes at least two, and it carries more weight the more touches it has, the more recent the last one is, and when it lines up with an independent reference: a Fibonacci retracement, the price where most volume traded (the volume profile) or a level that also shows on the weekly chart.
There is one case worth recognising: the level that flips roles. A resistance that price breaks and that later holds declines is the same line doing the opposite job, and it tends to be among the most watched.
04Rule three: a trendline needs three touches and no close against it
Any straight line goes through two points. That is why a trendline is not confirmed until the third touch: it is the one that shows the line was not put there by whoever drew it.
And a broken trendline stops being one. If any close since its origin has landed clearly on the other side, the line no longer describes what price is doing, however often it touches it again afterwards.
It pays to look at two horizons. The long-term trendline, anchored on the turns of one or two years, tells the underlying trend; the short-term one, over the last few months, tells what price is doing now. When both point the same way the reading is clear. When they disagree, the underlying trend is being tested.
05Four questions before trusting a line
- Which bars are the touches on? If you cannot point to the dates, the line is an impression.
- How many times has price turned there? Once is chance; twice, a level; three or more, one the market knows.
- Has any close crossed it? A trendline cut by a close is no longer a trendline.
- Does it line up with anything else? Fibonacci, volume or the weekly chart: two independent references at the same price weigh more than one.
Frequently asked questions
What is support in technical analysis?
A price where declines have stalled several times. For it to be checkable, each of those stalls has to be the low of a specific bar and a real turn, not a small wiggle. Resistance is the same thing upwards: a price where advances have stalled several times.
How many touches does a support need to be valid?
At least two real turns within a narrow band, measured in proportion to the asset's volatility. A trendline, being sloped, needs three, because any straight line goes through two points. The more touches and the more recent the last one, the more weight the level carries.
Is support a line or a zone?
It depends on how the turns are spread. If they land at almost the same price, a line describes it well. If they spread over a band wider than half an average bar range, the honest thing is to draw a zone, because the market reacted across that whole stretch rather than at one exact cent.
What does it mean when support becomes resistance?
That the level has flipped roles. A resistance that price breaks and that later holds declines from above is the same line doing the opposite job. It is one of the most watched patterns, because it shows the market still reacts to that price in both directions.
This article describes how levels are drawn, not what to do with them. No line says where price will go.
This is information and analysis, not financial advice, and it contains no recommendation to buy or sell. See the disclaimer.