# Forecast highlight (Highlight & filter example)

> WestCoast Charts 1.1.5, release, public Core release, on npm. HTML: https://westcoast-charts.com/gallery/highlight-filter/forecast-highlight/ · Index for agents: https://westcoast-charts.com/llms.txt

Forecast points are dashed and shaded apart from actuals.

- Chart type: `line` (Line)
- Collection: Highlight & filter · Highlight filter
- Raw configuration: https://westcoast-charts.com/gallery-src/highlight-filter/forecast-highlight.js
- Standalone example: https://westcoast-charts.com/embed/samples/wcc/gallery/highlight-filter/forecast-highlight.html

## Setup

```js
import WestCoastCharts from 'west-coast-charts'
```

## Options

```js
const options = {
  chart: {
    height: 380,
    fontFamily: "Inter, Geist, \"IBM Plex Sans\", system-ui, sans-serif",
    type: "line",
    toolbar: {
      show: false
    }
  },
  series: [
    {
      name: "Demand",
      data: [99, 95, 93, 97, 97, 101, 99, 98, 98, 96, 94, 97, 99, 98, 96, 99, 100, 100, 99, 99, 96, 96, 94, 93]
    }
  ],
  forecastDataPoints: {
    count: 6,
    dashArray: 5,
    fillOpacity: 0.5
  },
  xaxis: {
    categories: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
  },
  annotations: {
    xaxis: [
      {
        x: "Jul",
        x2: "Dec",
        fillColor: "#7c3aed",
        opacity: 0.06,
        label: {
          text: "Forecast"
        }
      }
    ]
  },
  stroke: {
    width: 3,
    curve: "smooth"
  },
  title: {
    text: "Demand with 6-month forecast"
  },
  theme: {
    mode: "light",
    preset: "coastal"
  }
}

const chart = new WestCoastCharts(document.querySelector('#chart'), options)
await chart.render()
```

## Verify

- Text check (Library 1.1.5): load `west-coast-charts/agent/describe` and call `chart.describe({ format: "json" })` for the actual drawn state. The live reader is on this example’s HTML page.
- Command line (Public agent tools 0.2.3, tested with Library 1.1.5; available from the versioned GitHub release and npm, https://westcoast-charts.com/docs/cli/index.md): `wcc chart export highlight-filter-forecast-highlight.json --out highlight-filter-forecast-highlight.svg --with-table` (save the options above as JSON first)