A mirror bar chart or double bar chart is a special type of bar chart (actually, a simplified version of a diverging chart referred to as a comparative histogram) that displays two sets of data comparatively side by side along the vertical axis. The chart resembles a reflection of a mirror, hence the name "mirror bar chart":

A histogram chart is often confused with a bar chart because it displays data using bars of different heights. The 'true' histogram chart shows the distribution of numerical data. Each bar of the histogram represents the count of data values within the specified range. See more about different types of histogram charts in Excel.

For certain chart types, you can add error bars to your chart. Error bars often are used to indicate "plus or minus" information that reflects uncertainty in the data.

If you have a line chart with two different data series, you might want to compare those series at each point along the horizontal axis. There are two different options available in two locations, along with the Chart Design tab of the ribbon:

Gantt chart is a horizontal bar chart that is often used in project management applications.

Candlestick chart is a style of bar-chart used primarily to describe price movements of a security, derivative, or currency over time. It is a combination of a line-chart and a bar-chart, in that each bar represents the range of price movement over a given time interval. It is most often used in technical analysis of equity and currency price patterns.

In Excel, you can create a variety of different charts to compare two or more data sets. When comparing two data sets, charts such as butterfly, mirror, tornado, etc., are often used, where the differences in the data sets are not always clearly visible.

Candlestick chart is a style of bar-chart used primarily to describe price movements of a security, derivative, or currency over time. This chart type is often used in combination with the volume bars chart for technical analysis of stock and foreign exchange patterns.

Usually, horizontal lines are added to a chart to highlight a target, threshold, limits, base, average, or benchmark. These lines, for example, can help control if a process is behaving differently than usual. Excel allows you to add a vertical line to an existing chart in several different ways, e.g., by calculating line values for a scatter, line, or column chart, but using error bars is the easiest way to add a vertical line to a chart:

Diverging stacked bar charts, also known as centered stacked bar charts, are widely used to display the results of surveys, polls, or questionnaires analyzed through a ranking scale such as a Likert or numeric scale.