Google Chart and FileMaker API
Google has a chart API that can be integrated easily with FileMaker Pro using just the WebViewer.
This simple approach can be accomplished in minutes and has few moving parts.
First, look at the wide array of charts that Google offers.
There are simple charts like bar graphs and pie charts, combination charts that show both line and bar graph data, and even advanced charts that show animation or maps.
This article has a video and a sample file to show the “Hello, World!” program and demonstrate integration of the simplest chart.