バーチャート(Bar Chart)

What is a Bar Chart?

What is a Bar Chart? A Complete Guide from Basics to Practical Use

1. Overview of Bar Charts

A bar chart is a chart format that represents price fluctuations with a single vertical line (bar), visually indicating the Open, High, Low, and Close (OHLC) prices. It is one of the primary chart types used in FX and CFD trading to analyze trends and understand market momentum.

Basic display example of a bar chart, showing price fluctuations with a single vertical bar.
Basic display example of a bar chart

2. Components of a Bar Chart (OHLC)

Each bar contains the following information. A bar chart is composed of four price points: Open, High, Low, and Close (OHLC).

Components of a single bar in a bar chart, illustrating the Open, High, Low, and Close (OHLC).
OHLC display of a bar chart
  1. Open
    Indicated by a short horizontal line on the left, it shows the starting price of the period.
  2. High
    The top of the vertical line, representing the highest price during the period.
  3. Low
    The bottom of the vertical line, representing the lowest price during the period.
  4. Close
    Indicated by a short horizontal line on the right, it shows the closing price of the period.

3. Features and Advantages of Bar Charts

  • Rich in Information
    Allows for the simultaneous understanding of the open, high, low, and close prices within a single bar.
  • Useful for Trend Analysis
    The position and length of each bar help in confirming the momentum of uptrends and downtrends.
  • Difference from Candlesticks
    While candlestick charts are visually intuitive due to color coding, bar charts excel at conveying more detailed price movements.

4. How to Use Bar Charts

  • Trend Confirmation
    If the highs of the bars are progressively rising: Uptrend.
    If the lows of the bars are progressively falling: Downtrend.
  • Checking Price Volatility
    If the vertical bar is long: High volatility.
    If the vertical bar is short: Low volatility.
  • Detecting Gaps
    A space (gap) between bars suggests rapid price movements or the impact of news in the market.

5. Practical Application Examples

・Trend Following
In an uptrend, a series of bars with rising highs and lows suggests trend continuation. Conversely, in a downtrend, a series of bars with falling highs and lows will appear.

・Confirming Range-Bound Markets
When the range between the highs and lows remains consistent, it indicates that the price is trading within a specific range.


6. Precautions and Limitations

  • Can Be Visually Simple but Difficult to Interpret
    The large amount of information can sometimes be challenging for beginners to understand at a glance.
  • Combination with Other Indicators is Recommended
    Since it's difficult to determine trend strength or overbought/oversold conditions with a bar chart alone, combining it with other indicators like Moving Averages or RSI is effective.

7. Comparison with Other Charts

・Line Chart
Compared to its simple structure based only on open or close prices, a bar chart provides more detailed price information.

Comparison example of a bar chart and a line chart
Comparison of Bar Chart and Line Chart

・Candlestick Chart
While candlestick charts make it easy to intuitively grasp price increases/decreases through colored bodies (bullish/bearish), bar charts are better suited for accurately understanding the relative positions of the four key prices.

Comparison example of a bar chart and a candlestick chart
Comparison of Bar Chart and Candlestick Chart

8. Summary

Bar charts are a fundamental yet highly informative chart format in the FX and CFD markets. They are particularly effective for confirming detailed price fluctuations and are useful for trend following and identifying range-bound markets. By combining them with other technical indicators and chart formats, you can expect to further improve your trading accuracy.

Deepen your understanding of bar charts and take another step forward on your path to becoming a Fundora prop trader.


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