Describe the techniques employed when showing quantitative differences between Bar and Pie Charts.
BAR AND PIE CHARTS
Bar charts are one of the most popular types of chart used in technical analysis. It is a visual representation of an activity over a given period of time and is used to spot trends and patterns (http://www.investopedia.com/terms/b/barchart.asp#axzz1k27ddlNT).
An example of this is a chart in which the price of security over a day or a certain period is shown. At the top of the vertical line indicates the highest price a security traded during the day or any period for that matter, and the bottom represents the lowest price. The closing price is displayed on the right side of the bar, and the opening price is shown on the left side of the bar.
This chart may be derived from a table where each column corresponds to one data series. One special column corresponds to the x-axis labels. ...