Order blocks: what a zone is, and what it actually did

By the end of this lesson you will be able to look at any chart and say, in plain words, what an order block is, why it was drawn where it was, and what happened when price first came back to it. You will also be able to read what first returns did on one chart, and say why those counts are history, not a promise.

1. The idea in one sentence

Foundry lesson. Free, no gate. Page: /foundry/order-blocks/. Educational interpretation only. Not financial advice.

An order block is the last candle that closed the other way before price closed through a recent swing high or low. Before a break up, it is the last candle that closed down. Before a break down, it is the last candle that closed up. Many traders draw that candle's price range as a box and watch what price does when it comes back to it.

That is the whole idea. The name suggests a story about who placed orders there, but the chart cannot show that. What it shows is a candle, a break, and what came after.

Honest limit: a zone describes a past candle. It does not explain why price turned there or say what price does next.

2. Start with a confirmed swing

A swing high is a high with lower highs on both sides of it. A swing low is the mirror. The catch is that you only know a high was a swing once some candles have closed after it. With five candles on each side, the most common choice, a swing is confirmed five candles after it happened. See Reading market structure for how swings build a trend.

Honest limit: fewer candles on each side confirm swings sooner but find more small ones. More candles find fewer, larger swings, later. Neither is the true swing.

3. The break: a close, not a wick

A break up is the first finished candle that closes above the latest confirmed swing high. A break down is the first that closes below the latest confirmed swing low. A wick that pokes through and closes back inside is not a break. Each swing can only be broken once.

Honest limit: a close through a swing is a fact about that candle. It does not mean the move continues.

4. The last candle the other way

Once a break up has closed, look back from it, no further than the swing low that started the leg, and find the nearest candle that closed down. That candle is the order block. For a break down, find the nearest candle that closed up, no further back than the swing high. A candle that closed exactly where it opened counts as neither. If no candle in that stretch closed the other way, there is no zone.

Honest limit: this is one rule among several. Different tools pick different candles from the same chart, which is why a tool should say which rule it uses.

5. Body or full candle

The zone can be the candle's body, from its open to its close, or its full range, from its high to its low. The body gives a narrower zone. The full candle gives a wider one, so price reaches it more often.

Honest limit: the choice changes which zones price comes back to and so changes every count. Pick one and keep it, rather than switching until a chart looks better.

6. Drawn late, by design

Put the steps together and every zone appears late. The swing needs its five candles. The break needs to close. Only then can the zone be drawn, back at the candle it came from. A zone can easily appear six or more candles after its own start.

That delay is honest. A box that appears at its start candle, before the break has even happened, is a box that can later move or vanish. A box drawn on a finished break never changes.

Honest limit: looking at an old chart, every zone seems to have been there all along. It was not. Check when it was drawn before judging it.

7. Zones below, zones above

A break up leaves a zone below price. A break down leaves a zone above price. They are the same idea, mirrored, and they should be read and counted separately, because price coming down to a zone below and price coming up to a zone above are different situations.

Honest limit: a mirrored rule treats both sides fairly. It does not mean both sides behave alike on a given chart.

8. Why broken zones must stay on the chart

Many order block tools remove a zone once price closes through it. Scroll back on such a chart and every box left standing is one that held. The chart becomes a gallery of winners, and every zone looks more reliable than it was.

The fair way is to keep every zone: the ones that held and the ones that broke, side by side, as faded outlines once their result is in.

Honest limit: keeping every zone makes the chart busier. It is the price of seeing the failures as well as the successes.

9. The first return

The test of a zone is the first time price comes back to it: the first finished candle after the zone was drawn whose high-to-low range reaches into it. Later touches of the same zone add nothing new, so only the first counts.

One more rule keeps the count honest: watch one return at a time. If price reaches a second zone while the first is still being watched, the second is noted but not counted, so the same candles are never counted twice.

Honest limit: many zones are never revisited. A zone that price never came back to tells you nothing about how zones behave, so it is left out of the count.

10. Three outcomes over ten candles

From the return candle, watch it and the nine candles after it, ten in all, and sort the return into one of three outcomes. For a zone below price (mirror everything for a zone above):

• Held: a candle closes at least one ATR above the zone's top before any close below its bottom. ATR, the average true range, is the typical size of one candle over the last 14. It is measured on the return candle and then fixed. See the ATR lesson.
• Closed through: a candle closes below the zone's bottom first. If the return candle itself closes below it, that settles it on the spot.
• No clear move: neither happens within the ten candles.

Only closes decide. A long wick through either line decides nothing, and every unclear case goes to no clear move, never to held.

Honest limit: ten candles and one ATR are choices. A longer window or a smaller distance would sort the same returns differently.

11. This chart: "Here"

The panel counts this chart's own settled first returns on the side being read, in the last 500 candles: for example "Here: 9 of 14 went through." Under 8 it reads "Too few here to count yet (n)." with the number so far. Every number on the panel comes from the chart you are on.

This count is for checking by eye: the marks on the chart are the same returns. It never sets the header, because 14 returns is far too few to tell a habit from chance.

Honest limit: another chart, another timeframe or another swing setting gives different zones and a different "Here".

12. Reading the count: compared with what?

"9 of 14 went through" says most first returns on that chart did not hold. A fair question to ask of any count is: compared with what? On your own chart, you can answer it yourself. Pick a few ordinary old candles with no swing break behind them, wait for price to come back to each, and judge those returns by the same ten-candle rule. If they did about as well, the zones told you nothing extra.

The header does not call a side. It reads "[TP] OB | No clear lean" on every chart and every timeframe.

Honest limit: "No clear lean" is not a failure. It tells you not to treat a zone as special just because it has a name.

13. Titan research: zones against random old candles

Titan research. We tested this rule on 200 markets offline. This is our research, not something the indicator reads on your chart.

We took every first return to a zone in 198 stocks on daily candles (January 2020 to October 2026) and 200 stocks on one-hour candles (October 2025 to October 2026), judged by the same ten-candle rule. On daily candles, 63 in 100 zones below price went through (5,574 returns) and 66 in 100 zones above (4,823 returns). On one-hour candles, 61 in 100 below (5,973 returns) and 63 in 100 above (5,872 returns). Then we did the same with random old candle bodies of any colour: 62 in 100 went through on daily candles, 60 in 100 on one-hour candles. The biggest gap was 4 in 100. In our test, a zone did about as well as any old candle.

That is why the Mentor does not call a side, and why every number on its panel is counted on the chart you are on.

Honest limit: these markets are stocks from today's ethical-screen list, so markets that no longer trade are missing.

14. Why the counts are history, not promises

A count of past outcomes feels like a probability. It is not quite one:

• Small samples. One chart's 14 returns is not many. A few lucky ones can tilt it.
• One chart, one setting. This chart's count follows its own zones and settings.
• Markets change. The years counted may have been calmer or wilder than now.
• The window rolls. As old returns drop out of the last 500 candles, "Here" can shift with nothing new on the chart.

That is why this chart's count never sets the header, and why the header stays "No clear lean".

Honest limit: counts are the most honest summary of the past we can give. They are still only the past.

15. What changing the settings does

• Swing strength: fewer candles each side give more, smaller zones; more candles give fewer, larger ones, later.
• Body or full candle: wider zones are reached more often, so the counts change.
• Where a box ends: ending a box on a wick instead of a close only changes how it looks. The count always uses closes.
• The timeframe: each timeframe has its own swings, its own zones and its own count.
• Higher timeframe zones: off by default. Turned on, it draws zones from a bigger timeframe as dashed outlines, only to look at: they are never counted.

Honest limit: changing settings until an old chart looks clean makes it look better on that chart only.

16. Honest limits, all in one place

• A zone is a past candle: it shows where price turned, not why.
• Drawn late: every zone appears some candles after its start.
• One rule of several: other tools pick other candles.
• First returns only: zones never revisited are not counted.
• Closes decide: a wick decides nothing.
• Counts: history, on one chart, not a promise.
• Compared with what: in our offline research, zones did about as well as random old candles. The indicator does not show that study; it counts your chart only.
• Small samples: one chart's count is too small to set the header.
• Neither side is favoured: every read works the same way above and below.

17. Six common traps

1. Treating a box as a floor or a ceiling. It is one past candle.
2. Forgetting the zone was drawn late. Check when it appeared.
3. Only seeing the zones that held. Keep the broken ones in view.
4. Counting every touch. Only the first return is a fresh test.
5. Letting a wick decide. Wait for the close.
6. Reading one return as proof. Count the zones that broke as well as the ones that held.

18. Practise it

• Pick one market and one timeframe and keep them for a few weeks.
• When a new zone appears, say out loud which swing broke and which candle became the zone.
• When price first comes back to it, note it, then watch ten candles. Held, closed through, or no clear move?
• Keep a one-line log per zone, including the ones that did not go the way you expected.
• After a dozen returns, count them yourself before you look at any panel.

19. See it explained live: [TP] Order Blocks - Mentor

Everything in this lesson is built into [TP] Order Blocks - Mentor, a free indicator on TradingView. It draws the zones on your price chart and talks you through them in plain English, so you can practise on live markets instead of from memory.

Here is where each part of the lesson shows up:

• The rule (sections 1 to 5). Each zone has a small dot at its start candle. Hover it and it explains that zone, for example "Order block: last candle that closed down before the break up. Body used. Drawn when the break closed, 4 candles later." (NAS100 daily, 19 Oct 2026). "Swing strength" sets the swing (Balanced, five candles each side, by default) and "Zone uses" picks Body or Full candle.
• Drawn late (section 6). Every box appears when its break closes, and the tooltip says how many candles late.
• Both sides (section 7). Zones below price are shaded in the up colour, zones above in the down colour, and the panel counts each side separately.
• Broken zones stay (section 8). Settled and expired zones stay as faded outlines. "Show past zones" hides them without changing any count. A zone untouched for 300 candles is retired and never counted.
• The first return and its outcome (sections 9 and 10). While a return is being watched, its zone has a gold border and a gold ring that says "Still open, not counted yet". Then "Mark past events" puts a filled circle for held, a square for closed through and a hollow ring for no clear move, on the return candle at the middle of the zone. The marks are neutral grey, so the shape carries the meaning. The last 12 stay on the chart, and the chart keeps the 6 most recent zones by default.
• The counts (sections 11 and 12). The header reads "[TP] OB | No clear lean" in a muted colour. Then this chart's own count. Every number comes from the chart you are on. Under 8 returns on that side, "Here" reads "Too few here to count yet (n)."
• The context. With "Panel detail" on Full, one line says what would change the read: "Changes if: a close below this zone." and one gives the legend "● held ■ closed through ○ no clear move".
• On the chart at the top of this lesson, NAS100 daily on 19 Oct 2026, the panel read "Zone below, first return recorded." then "Here: 9 of 14 went through."
• How to read the panel, top to bottom. The header, the nearest zone in words, this chart's count, one teaching line such as "A zone is a past candle, not a floor.", and the footer: "Closed candles, last 500. Not advice." It never prints a percentage and never instructs.
• Easier to read. "Colours" on Auto matches your chart. "Panel text size" goes from Tiny to Large, and Compact keeps the panel to five rows.

A good way to use it: say what you see first: which swing broke, and which candle became the zone? When price comes back, say what you expect, then watch the ten candles. Then check this chart's count on the panel. Where you disagree is where you learn.

Test yourself

Take the 17-question quiz below to check what stuck.

Educational interpretation only. Not financial advice. Every zone describes a candle that already closed, and the counts are history, not promises about what comes next.