Point of Control and Value Area

A busy price tells me where the crowd agreed yesterday, not where it will agree tomorrow.

• Identify the Point of Control in a volume-by-price table as the single price with the highest traded volume.
• Calculate the Value Area by expanding outward from the Point of Control, adding adjacent price levels until the running total reaches or passes roughly 70% of total session volume.
• Explain why the Point of Control and Value Area describe past trading agreement rather than predicting future price movement.
• Recognize that a Value Area total landing slightly above 70% (such as 75%) is the expected, correct outcome, not a calculation error.

When you look at how much a stock traded at each price during a session, the volume is almost never spread out evenly. Some prices get traded a lot, others barely at all. That uneven pattern is useful, because it tells you where the crowd actually agreed a price was fair — not where price simply happened to visit.

The single price with the most volume is called the Point of Control, or POC. You find it by scanning the volume-by-price table and picking the largest number. That's it — no formula, just the biggest volume in the list.

But one price rarely tells the whole story. So analysts build outward from the POC to capture a fuller picture: the Value Area. Starting at the POC, you add the next-largest adjacent price level — the one right next to your current range, not just any high-volume price elsewhere on the table — and keep a running total. You compare that running total to 70% of the total session volume. Once your running total reaches or passes that 70% mark, you stop. The full range you've covered, from the lowest to the highest price included, is the Value Area.

This is a record of the past, not a forecast of the future.

Two things matter about how this stops. First, "adjacent" means next-door only — you're building a continuous zone around the POC, not cherry-picking scattered high-volume prices. Second, the running total will rarely land on exactly 70%. It will stop at the first level that pushes the total to or past 70%, so a result like 75% is expected and correct, not a mistake in your arithmetic.

Both numbers — POC and Value Area — are still just descriptions of one thing: what already happened in that session.

That's the shift worth holding onto: this is a record of the past, not a forecast of the future.

A busy price shows where trading agreement was thickest. It doesn't promise where price goes next.

Take one session's volume-by-price table for a stock trading between ₹497 and ₹503:

₹497 — 500 contracts ₹498 — 1,500 ₹499 — 3,000 ₹500 — 5,000 ₹501 — 2,500 ₹502 — 1,000 ₹503 — 500

Add these up and the total session volume is 14,000 contracts.

First, find the POC: scan the table for the single largest number. That's ₹500, with 5,000 contracts — more than any other price. So ₹500 is the Point of Control.

Now build the Value Area. The threshold is 70% of total volume: 70% of 14,000 is 9,800. Start the running total at the POC: 5,000 (₹500). Look at the adjacent levels — ₹499 has 3,000 and ₹501 has 2,500. Since ₹499's volume is larger, add it next: 5,000 + 3,000 = 8,000. That's still under 9,800, so keep going. The next adjacent level available is ₹501, with 2,500. Add it: 8,000 + 2,500 = 10,500. That crosses 9,800, so this is where the Value Area stops.

The Value Area is ₹499 to ₹501, covering 10,500 out of 14,000 contracts — 75% of the session's volume. That's a bit over the 70% target, and that's exactly how it's supposed to work: you stop at the first adjacent addition that reaches or passes 70%, you don't trim it back down to land on the number exactly. So this session's story is: ₹500 was where agreement peaked, and ₹499–₹501 together was the zone where three-quarters of all trading happened.

Point: Shows the exact mechanics of finding POC by inspection and building the Value Area through adjacent-only expansion, demonstrating why landing at 75% instead of exactly 70% is the correct, expected outcome.

• Treating the POC or Value Area as a signal that predicts where price will go next. — These numbers look like the 'important levels' traders talk about when making decisions, so it's natural to assume they must forecast future movement. Fix: Remember both describe only where volume already concentrated in a session that has already ended. Use them to understand what happened, not to predict what happens next.
• Building the Value Area by picking the two or three highest-volume prices anywhere on the table, even if they aren't next to each other. — Finding the POC trains you to hunt for the 'biggest number,' so it feels natural to keep grabbing big numbers wherever they appear. Fix: After the POC, only add a price level if it's directly adjacent to the range you've already built. Skip nothing — the Value Area must be one continuous band.
• Assuming the calculation is wrong if the Value Area doesn't add up to exactly 70%. — The 70% figure is stated so precisely that it looks like a target you must hit exactly. Fix: Stop adding levels as soon as the running total reaches or passes 70% — landing slightly above, like 75%, is the normal and correct result, not an error to fix.

• The Point of Control (POC) is simply the single price with the most traded volume in a session — found by scanning for the largest number.
• The Value Area is built by adding adjacent price levels outward from the POC until the running total reaches or passes 70% of total volume.
• You can only add levels that are next-door to your current range — never skip to a distant high-volume price.
• Landing above 70%, like 75%, is expected and correct; you stop at the first level that crosses the threshold, not the one that matches it exactly.
• POC and Value Area describe where the crowd already agreed in the past — they are not a promise of where price goes next.

Q1. In a volume-by-price table, what is the Point of Control (POC)?

• The single price level with the highest traded volume in the session
• The average of all prices traded during the session
• The highest price reached during the session
• The first price traded when the session opened Answer: The single price level with the highest traded volume in the session — The POC is found by scanning the volume-by-price table for the single largest volume number - it has nothing to do with the highest price reached or an average.

Q2. True or False: To build the Value Area, you can add any high-volume price from anywhere on the table, even if it isn't next to the range you've already built. Answer: False — The Value Area must be built by adding only adjacent price levels next to your current range, starting from the POC. Skipping to a distant high-volume price would break the continuous zone the Value Area is meant to represent.

Q3. A learner calculates a Value Area and finds it covers 74% of total session volume instead of exactly 70%. What should they conclude?

• This is normal - the Value Area stops at the first adjacent level that reaches or passes 70%, so landing slightly above is expected
• This means they made an arithmetic error somewhere and should redo the calculation
• This means the POC they chose was wrong
• This means they need to remove the last price level added to bring it back to exactly 70% Answer: This is normal - the Value Area stops at the first adjacent level that reaches or passes 70%, so landing slightly above is expected — Value areas rarely land on exactly 70% because you stop adding levels as soon as the running total reaches or crosses the threshold - a result like 74% or 75% is the expected, correct outcome.

Q4. A stock traded these volumes in one session: ₹100 — 200, ₹101 — 800, ₹102 — 1,000, ₹103 — 600, ₹104 — 200. Total volume = 2,800, so the 70% threshold is 1,960. What is the Point of Control, and does the Value Area built from ₹101 to ₹103 cross that threshold? Answer: POC is ₹102 (highest volume at 1,000). Starting there and adding adjacent levels: 1,000 + 800 (₹101) = 1,800, still under 1,960, so add 600 (₹103) = 2,400, which crosses 1,960. So the Value Area is ₹101 to ₹103, and yes, it crosses the threshold. — ₹102 has the highest single volume (1,000), making it the POC. Building outward with adjacent levels: adding ₹101 (800) gets to 1,800, still short of 1,960, so you add the next adjacent level, ₹103 (600), reaching 2,400 - which passes the threshold, so the Value Area is ₹101 to ₹103.

Q5. Someone identifies yesterday's POC at ₹500 and tells a friend: "The stock is guaranteed to head back to ₹500 today." Does the POC predict where price will go next? Reveal: Weak: yes, POC shows the price the stock "wants" to return to. Strong: POC describes where trading volume already concentrated in a session that's already ended — a backward-looking fact, not a forecast; treating it as a guaranteed destination confuses history with prediction.