How to Draw Support and Resistance: Zones, Not Lines

Why support and resistance form

Support is a price area where a falling market has often stopped, and resistance is one where a rising market has often been blocked. Two reasons are usually given for why such areas form. The first is prices where a lot of trading took place in the past. If many people bought at a price, the thinking goes, orders to sell at breakeven or to buy more may appear when price comes back there. The second is prices that people remember. Previous highs and lows, and round numbers such as $100,000 or, on Korean won markets, ₩100 million, are thought to attract orders. Either way, the price itself has no power; it only means there may be orders from people who are paying attention to that price.

• Previous highs and lows: prices where the direction turned once
• Prices where trading clustered: where the volume profile is thick
• Round numbers: prices that end in zeros

Draw a zone, not a line

Even when price touches the same resistance several times, each bar's wick stops at a slightly different place. One bar's wick shoots up and comes back down; another bar's body simply ends near the level. So rather than drawing a thin line at a single price, shading a band between the wick tips and the body edges of the bars that touched is closer to the actual shape. Thinking in zones also cuts down on arguments over whether price crossed the line by a hair and counts as a breakout. But if you make the zone too wide, price will seem to stop inside it wherever it stops, so set the width to how far the touching bars were actually spread out.

Two views on a zone touched many times

The more times a zone has been touched and rejected, the more it stands out, and the more people pay attention to that price. From this angle, some treat zones with more touches as more important. Others argue the opposite: each touch fills the orders resting at that price and gradually uses them up, so a zone that has been tested many times actually becomes easier to break. Both explanations sound plausible, but there is little basis for saying in general which one is right. It is safest to take the number of touches as no more than a sign that the zone is easy to notice.

Role reversal: broken resistance becomes support

After price closes above a zone that used to be resistance and later comes back down to it, it sometimes stops in that zone this time and rises again. This is called role reversal, with broken resistance turning into support, and in the same way broken support can act as resistance on a bounce. The usual explanation is that people who missed the breakout want to buy if price returns to that level, but it does not always work that way, and sometimes price falls straight back below the zone. Using the pullback after a breakout as confirmation, and what that costs, is covered in the article on false breakouts.

Wicks or closes

People put their lines in different places on the same chart. The biggest difference is whether they anchor to the wick tips (highs and lows) or to the closes or bodies. Using wicks captures every place price actually reached, but a single sudden spike can drag the line. Using closes looks only at where bars ended, so there is less noise, but it can miss a price that was rejected several times within the bars. Rather than one being right, what matters is choosing one method and sticking with it, and if you draw a zone, the difference between the two methods fits inside the zone's width.

• Wicks: reflect every touch, but get dragged by spikes
• Closes: less noise, but may miss repeated rejections within a bar
• Zones: absorb the difference between the two as width

Levels set by formula: pivot points

Support and resistance can also be set by formula instead of by eye. The basic version, the classic pivot point, uses the high H, low L and close C of the previous bar (usually the previous day) to calculate a base value P and the levels above and below it. For example, with a previous-day high of 110, low of 100 and close of 106, P is about 105.33, R1 about 110.67 and S1 about 100.67. Crypto trades 24 hours a day, so the values depend on when the previous day's candle is taken to end (a Binance daily candle closes at 00:00 UTC). Rather than the formula itself having any special basis, the reason usually given for the attention these levels get is that many people use the same formula and look at the same prices. Doing the same calculation on the previous week's or month's bar usually gives levels spread over a wider range, and the Support & Resistance Finder shows the daily, weekly and monthly values together.

• P = (H + L + C) ÷ 3
• R1 = 2P − L, S1 = 2P − H
• R2 = P + (H − L), S2 = P − (H − L)

What the automatic finder does

The Support & Resistance Finder turns what people do by eye into rules. Among the closed bars in the most recent 500, it finds every swing high that is higher than the 5 bars on each side (3 or 8 bars, depending on the setting) and every swing low that is lower, then groups those lying within half an ATR (Average True Range) of each other into one zone. Zones where more swings cluster, and zones that formed more recently, count as stronger. Where trading was concentrated by price is shown separately by the Volume Profile Chart, and what percentage of a big move a price sits at is shown by the Fibonacci Retracement tool. The advantage is that the rules are fixed, so the result does not depend on who draws it, but it only finds where past prices clustered; it does not pick the prices that will hold in the future.

A common misconception: lines that fit perfectly in hindsight

Draw support and resistance on a past chart and it is easy to make price look as if it stopped at the line again and again. That is because you drew the line where price stopped in the first place. Cases where price went straight through a line after you drew it stick less in memory. And since price always stops somewhere, the more lines you draw, the more likely it automatically becomes that it stops at one of them. Support and resistance play a clearer role not as a forecast that 'it will stop here', but as a reference that tells you your original read was wrong once price moves through the zone.