Picture EURUSD on the hourly chart. Price drifts sideways around 1.0820 for three quiet candles. Then one candle closes 40 pips higher, the next adds another 30, and by the afternoon the pair trades at 1.0900. Two days later price slides back down to 1.0820, stalls for an hour and bounces again.
That small sideways patch at 1.0820 is what supply and demand traders call a demand zone. This guide explains what these zones are, why traders expect price to react at them, how to tell a strong zone from a weak one, and where the idea breaks down.
The idea behind a zone
Large participants such as banks and funds rarely fill a big order in one go. If a fund wants to buy a large amount of euros, it has to absorb the sellers available at that moment. While it buys, price often goes sideways in a tight range. That range is called the base.
When the sellers run out, price leaves the base fast. The sharp move away shows that buyers overwhelmed sellers at that price. The theory says some of those buy orders were left unfilled. When price comes back to the base, the leftover orders can be filled and price can react again.
Be honest with yourself about what this is. It is a model of order flow. On spot forex and CFDs you cannot see those resting orders, so you are inferring them from the shape of the chart. Sometimes the inference is right. Often there was nothing left at the zone and price walks straight through it.
The four zone patterns
Every zone has three parts: the move into the base (the leg-in), the base itself, and the move away (the leg-out). The direction of those two legs gives four patterns.
| Pattern | Sequence | Zone type | What it usually signals |
|---|---|---|---|
| Rally-base-rally (RBR) | Up, pause, up | Demand | Continuation of an uptrend |
| Drop-base-rally (DBR) | Down, pause, up | Demand | Possible reversal from a low |
| Drop-base-drop (DBD) | Down, pause, down | Supply | Continuation of a downtrend |
| Rally-base-drop (RBD) | Up, pause, down | Supply | Possible reversal from a high |
The leg-out decides whether a zone is supply or demand. If price leaves the base upwards, the base is demand. If it leaves downwards, the base is supply.
Continuation zones (RBR and DBD) tend to be easier to trade because they line up with the existing trend. Reversal zones (DBR and RBD) can offer a better price, but you are betting on the trend changing, and that is harder.
How to mark the zone
A zone has two edges.
- Proximal line: the edge closest to current price. For demand, this is the top of the base. For supply, it is the bottom.
- Distal line: the far edge. For demand, this is the lowest point of the base, usually including the wicks. For supply, it is the highest point.
Many traders use the bodies of the base candles for the proximal line and the wicks for the distal line. That keeps the zone tight enough to trade while still covering the full area where orders were filled.
What makes a zone worth watching
Not every pause on a chart is a tradeable zone. These are the qualities most supply and demand traders look for.
- Strong departure. The leg-out should be fast and large compared with the size of the base. Big-bodied candles with small wicks show real imbalance. A slow, overlapping drift away tells you very little.
- Short time at the base. One to six candles is a common guide. A base that lasts twenty candles is really a range, and the orders inside it were probably filled.
- Freshness. A zone price has not returned to yet is called fresh. Each return uses up some of the remaining orders, so a zone that has been tested twice is weaker than a fresh one.
- Location. A demand zone near the bottom of a larger range, or in the direction of the higher-timeframe trend, carries more weight than one sitting in the middle of nowhere.
- Room to move. If an opposing supply zone sits just above your demand zone, there is little space for a trade to pay.
A worked example on gold
Example only, with made-up but realistic prices.
On the XAUUSD one-hour chart, gold has been climbing all week. On Tuesday it pauses for three small candles between 2,398.50 and 2,401.20. The next two candles close at 2,409.80 and 2,418.00.
- Leg-in: up. Leg-out: up. That makes it a rally-base-rally demand zone.
- Proximal line: 2,401.20 (top of the base bodies).
- Distal line: 2,398.50 (lowest wick in the base).
- Zone height: 2.70. Leg-out: about 16.80 from the proximal line, or roughly six times the zone height. That is a strong departure.
On Thursday gold pulls back from 2,425 and reaches 2,401.00. This is the first return, so the zone is fresh. A trader using this zone might look to buy near 2,401, with a stop a little below 2,398.50 and a target under the next supply area.
If gold had instead closed an hourly candle below 2,398.50, the zone would be broken. Traders treat a clean close through the distal line as a sign the buyers are gone.
Fresh and tested zones
Think of a zone as a bucket of unfilled orders. The first visit takes some. The second visit takes more. By the third or fourth visit, the bucket may be empty.
That is why many traders only trade the first return to a zone. Some will trade a second test if the first reaction was strong and quick. Very few will trust a zone that price has touched repeatedly, because repeated touches often come just before a break.
Where supply and demand zones fail
The method has weak spots, and you should know them before you risk money.
- High-impact news. A US jobs report or a central bank decision can move price through any zone in seconds. The logic of resting orders does not hold up against a sudden repricing.
- Strong trends. In a powerful downtrend, demand zones fail one after another. Trading against the trend because "there is a zone here" is a common way to take several losses in a row.
- Subjectivity. Two traders can draw the same zone differently. Without fixed rules, it is easy to redraw zones after the fact so they look perfect.
- Wide zones. A zone 80 pips tall forces a wide stop, which shrinks your position size and makes the reward-to-risk poor.
- Front-running. Price often turns a few pips before the proximal line, or pierces the distal line by a few pips before reversing. Limit orders placed exactly on the line can miss the move or get stopped out early.
FAQ
Are supply and demand zones the same as support and resistance?
They overlap but they are built differently. Supply and demand zones come from a base followed by a strong move, and they weaken with each test. Support and resistance levels come from repeated turning points. The support and resistance section of this blog has a full comparison.
Which timeframe should a beginner use?
Start with the four-hour or daily chart to find zones. Higher-timeframe zones are fewer and cleaner, which makes it easier to learn what a good one looks like.
Do supply and demand zones work on gold and indices?
The same idea applies to any liquid market, including XAUUSD, NAS100 and US30. Zones on volatile instruments tend to be wider, so position sizing matters even more.
How long does a zone stay valid?
There is no fixed expiry. A fresh daily zone can stay relevant for weeks. A five-minute zone is usually stale within a session or two.
Trading involves risk. This article is general education, not financial advice.