# Theme River chart in Figma

> ECharts’ take on the streamgraph

Theme River is ECharts’ named streamgraph: series flow as bands around a shared centre, sized by value at each point in time. It takes a long-format table rather than a wide one, which makes it easy to feed from a database export.

## Available in 1 of 5 chart libraries

| Library | Ready-made examples |
| --- | --- |
| ECharts | 2 |

2 examples in total.

These are the real charting libraries running inside the plugin, not redrawn lookalikes. The theme river chart on your canvas is the library's own output, and the Export tab hands developers that same library's configuration plus React, Vue, Angular or Svelte code — so what you design is what gets built.

## Reach for it when

- Topic or theme volume over time — support tags, article subjects, event types.
- Your data is already long-format (date, series, value).

## Use something else when

- Exact values matter; like any streamgraph it has no fixed baseline.
- You need it outside ECharts — no other bundled library offers it.

## The data it needs

Long format: one row per date and series, with the value.

| Date | Series | Value |
| --- | --- | --- |
| 2026-01 | Billing | 42 |
| 2026-01 | Login | 31 |
| 2026-02 | Billing | 55 |

---

Install Figma Charts: https://www.figma.com/community/plugin/1345221583582136577/figma-charts

All chart types: https://systergon.com/figma-charts/chart-types