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Stock charts

A stock chart is a record of prices people already paid. Learn to read it accurately, and learn exactly where its usefulness ends.

  • 5 explainers
  • 3 glossary terms
  • 34 min of reading
A candlestick chart of daily prices in charting software
Photo: "Qtstalker candlestick chart" by user:yndesai, CC0 (edited: cropped, resized, colour-graded).

Every stock page has a chart, and most beginners look at it first. This topic teaches you to read one the way you would read a table of numbers: carefully, in a fixed order, and without guessing at what it means for the future. The SEC puts the limit plainly: past performance cannot predict how an investment strategy will perform in the future [1].

Start with how to read a stock chart. It covers the price and time axes, the three main chart types, why the time window and the price scale can change the story, and how a stock split can look like a crash. Then learn what sits inside each period with candlestick charts, which pack the open, high, low and close into one shape [2].

Moving averages explained works through a simple moving average day by day and shows why the 50-day and 200-day lines always lag the price. Support and resistance explains the price levels traders draw on charts and what they are not. Technical indicators and ratings explains the "Strong Buy" or "Sell" summaries some quote sites show next to a chart, and why they are not advice.

Short definitions live in the glossary: bull market, bear market and market correction. If you size trades with a stop price, the position size calculator works out how many shares fit the amount you plan to risk.

Worked examples use hypothetical stocks calculated in code, never live prices or trading signals, and definitions and rules link to primary sources such as the SEC, FINRA and CME Group.

Explainers in this topic

Terms used in this topic

  • +20% FROM THE LOW

    Bull market

    A bull market is a period of rising stock prices, generally a rise of 20% or more in a broad index. What the SEC definition says, with a real example.

  • LOSS VS GAIN NEEDED

    Bear market

    A bear market is a period of falling stock prices, generally a drop of 20% or more in a broad index. The definition, the 2020 example and the recovery math.

  • LOSS VS GAIN NEEDED

    Market correction

    A market correction is a reversal of at least 10% in a stock, index or other market. How it differs from a bear market, with a calculated example.

Questions people ask about this topic

What is the first thing to check on a stock chart?

The time window and the chart type. The same stock can be up over a year and down over three months, and a line chart shows only closing prices [3]. Read how to read a stock chart first.

Can charts tell me when to buy or sell?

No. A chart is a record of past prices, and past performance cannot predict future results [1]. Any stock can lose money [4].

What is a bear market on a chart?

Investor.gov says a bear market generally occurs when a broad market index falls by 20% or more over at least a two-month period [5]. A bull market is generally a rise of 20% or more over at least two months [6].

Sources

  1. Investor Bulletin: Performance Claims. U.S. Securities and Exchange Commission (Investor.gov), 2022.
  2. Candlestick chart Definition. Nasdaq.
  3. Chart Types: candlestick, line, bar. CME Group, 2018.
  4. Stocks - FAQs. U.S. Securities and Exchange Commission (Investor.gov).
  5. Bear Market. U.S. Securities and Exchange Commission (Investor.gov).
  6. Bull Market. U.S. Securities and Exchange Commission (Investor.gov).