# StockCharts High-Low Index

## Overview <a href="#overview" id="overview"></a>

The StockCharts High-Low Index is a 10-day moving average of Record High Percent, which equals new 52-week highs divided by the sum of new 52-week highs plus new 52-week lows. This breadth indicator shows when new highs outnumber new lows and when new highs are expanding. In general, new highs outnumber new lows when the indicator is above 50. New highs are expanding when the indicator is above 50 and rising.

## Details <a href="#details" id="details"></a>

**Symbol Group:** High-Low Index

**Publisher:** StockCharts

**Update Frequency:** End-of-day (EOD). These indicators are updated after the market close, usually by 6:00 PM ET.

**Links to Current Symbols:** [High-Low Index](https://stockcharts.com/search/?q=%22High-Low%20Index%22\&section=symbols)

## Data Characteristics <a href="#data_characteristics" id="data_characteristics"></a>

StockCharts uses a three-step process to calculate the High-Low Index for several stock indices. First, StockCharts maintains component lists for these indices. Second, our scan-engine uses these component lists to run scans based on the price data for the individual stocks. Third, the data is updated and published to our website.

This “in-house” data may differ from other sources due to differences in the index components and price data. Index components change and require updates on a regular basis. Additionally, note that StockCharts uses dividend-adjusted data for its calculations, while other sources may use non-adjusted data.

## Chart Example <a href="#chart_example" id="chart_example"></a>

The chart below shows the S\&P 500 High-Low Index ($SPXHILO) in the main window and the S\&P 500 in the indicator window. Notice how the High-Low Index held above 50 (and at a high level) when the S\&P 500 advanced, but the indicator moved below 50 during the two corrections.

<figure><img src="https://436553459-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FERtrZrZOhufFzk6ZQO4B%2Fuploads%2Fzs53t6Te8vsSIIETl1pR%2Fsym-hiloindex-exam.png?alt=media&#x26;token=bbd71a2a-ce31-42a0-8cb1-b7f67b7addc5" alt=""><figcaption><p>High-Low Index</p></figcaption></figure>

## Symbol List <a href="#symbol_list" id="symbol_list"></a>

StockCharts.com users can access [an up-to-date list of symbols](https://stockcharts.com/search/?q=%22High-Low%20Index%22\&section=symbols) for all our High-Low Index indicators. From this list, click the “Mentions” icon to the right of a specific symbol for more details about the symbol, as well as recent mentions in Public ChartLists, blog articles, and more.

## Additional Resources <a href="#additional_resources" id="additional_resources"></a>

### ChartSchool Articles <a href="#chartschool_articles" id="chartschool_articles"></a>

[**High-Low Index**](https://chartschool.stockcharts.com/table-of-contents/market-indicators/high-low-index)\
The 10-day moving average of the Record High Percent Index, which is a breadth indicator.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://chartschool.stockcharts.com/table-of-contents/index-and-market-indicator-catalog/stockcharts-high-low-index.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.