Scatter Chart
Scatter Chart (also known as Scatter Plot, Scatterplot, Scatter graph, Scattergram, Scatter Diagram) is used to display values in a two-dimensional coordinate system. Each point’s location is determined by one of its coordinates on one axis of the chart and the other coordinate on another axis.
Anything can be a bullet
In amCharts 4 any element can be a bullet. In this case we’re plotting Rectangle elements as bullets.
Demo source