# Point of control

**TA-09 · Technical Analysis · Core**

**Lesson question:** Which price had the most activity, under which definition?

Original fictional examples; educational writing, not live market data, orders or production approval.

## By the end

- Explain the mechanism in the lesson question.
- Reproduce the worked comparison and recognize its failure case.

**Prerequisites:** TA-01

Volume POC is the price bin with the greatest traded volume in a stated window. A time-price-opportunity POC measures something different. POC is not automatically support, resistance or a magnet.

## Understand the mechanism

Specify instrument, venue, session, bin size and tie handling. POC is a mode, whereas VWAP is a weighted mean. They can differ, especially in a multimodal profile. Changing binning or the observation window can change the dominant price.

## Walk through the process

Read current price relative to the profile and whether new acceptance is forming elsewhere. Use the actual data source's volume, not an assumption that one ETF or futures feed represents all linked markets. Do not carry an old POC forward as permanent value.

## Pause before deciding

Describe what the example actually establishes and what remains unknown. A technical observation supplies context, not an automatic options entry. Contract cost, horizon, liquidity and the consequence of failure still need to match the thesis. Record the contrary branch so a named pattern cannot become an excuse to ignore new evidence.

## A worked example

Bins 99,100,101,102 have volumes 100,400,300,200. POC is 100. VWAP is (99×100+100×400+101×300+102×200)/1,000=100.60. The chart is volume by price, not a chronological path.

## Calculation popup: POC versus VWAP

```text
POC=argmax(volume); VWAP=Σ(price×volume)/Σ(volume)
```

These are different summaries of the same fictional profile.

1. Largest volume 400 is at 100.

2. Weighted total 100,600; total volume 1,000.

**Result:** POC 100; VWAP 100.60.

## Graph: Point of control—worked comparison

**Horizontal:** Price bin (USD)  
**Vertical:** Volume units

Fictional data from the written example. The chart organizes the comparison; its shape is not a forecast.

Complete numerical data are embedded in `scripts/technical-analysis/TA-09.js` and displayed as an accessible table in the HTML lesson.

## What would invalidate the reading?

A move away can be genuine repricing rather than a deviation that must reverse. Bad aggregation or mismatched session windows can create false signals.

## Check your understanding

### What are POC and VWAP?

**Answer:** 100 and 100.60.

**Why:** Largest bin versus weighted average.

### What is the critical failure to avoid?

**Answer:** A move away can be genuine repricing rather than a deviation that must reverse. Bad aggregation or mismatched session windows can create false signals.

**Why:** Explain this risk before treating the example as a decision rule. A correct calculation does not guarantee a favorable market outcome. **Critical risk check.**

## Takeaway

Return to the question: Which price had the most activity, under which definition? State the observed facts, the assumptions and the failure condition separately.

## References and provenance

The cited references support definitions and conventions. The teaching prose, tickets and numerical scenarios are original; they are not attributed as historical market observations.

- [Fidelity Technical Analysis Guide](https://www.fidelity.com/learning-center/trading-investing/technical-analysis)

- [Fidelity Chart Patterns Reference](https://www.fidelity.com/quick-content/etf/help/research/learn_er_quotes.shtml)