A chart is a data-driven graphical display item that allows you to display low-resolution data in different chart types. You can place and configure a chart on any view or dashboard.
A trend chart is a different display item that displays current and high-resolution history data. See Trend chart.
To create a chart, you select a chart type, define it roughly and then fine tune it for appearance and labeling and then configure it for data. See Creating a report or chart holder.