A Bubble chart is like a Scatter chart in which the data points are replaced with bubbles. This type of chart can be used instead of a Scatter chart if your data has three independent values. The BubbleChart uses three values for each data point: x, y, and y1. The X element values determine the Cartesian position along the x-axis, the Y element values determine the Cartesian position along the y-axis, and the Y1 element values determine the size of the bubble at each point.

Bubble charts help make three dimensional data more visually appealing to readers. This can be beneficial in displaying financial data when you want to use the different bubble size to emphasize the values.