# Create Components for Forecast Pages
Create custom Aura components that are available to add to Lightning forecasts pages.
To add a custom template to a Lightning forecasts page, implement the `lightning:forecastingTemplate` interface.
To allow the component access to a Lightning forecasts page, implement the `lightning:availableForForecastingPage` interface.
Upon initialization, the component attempts to populate the following attributes to provide some forecast context. The attributes include:
- `contextPeriodIds`—The time period IDs from the user context.
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- `currencyIsoCode`—The ISO code of the unit of currency that the user views.
```nolang
```
- `forecastingOwnerId`—The forecast owner's user ID.
```nolang
```
- `forecastingTerritoryId`—The forecast territory's ID.
```nolang
```
- `forecastingTypeId`—The user’s selected forecast type.
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```
- `scope`—The supported scope type. If `scope` is undefined or null, a single territory or role page is loaded.
```nolang
```
```nolang
SupportedScopeType : {'my_territory'}
```
Lightning forecasts pages don’t support any standard or custom events published from custom components.
When the Lightning forecasts page changes, such as owner or forecast type, the page header publishes a Lightning message. You can subscribe to the `lightning__forecasting_flexipageUpdated` LightningMessageChannel to update your custom components based on Lightning forecasts page header changes.
:::note
To ensure that custom components appear correctly, enable them to adjust to variable widths.
:::
- **[Sample Custom Components for Forecasts Pages](/docs/platform/aura-platform/guide/components-custom-for-app-builder-forecasts-page.md)**
Review samples of custom Aura components that you can implement in Lightning forecasts pages. Lightning forecasts pages don’t support any standard or custom events published from custom components.
**See Also**
- [Communicating Across the DOM with Lightning Message Service](/docs/platform/aura-platform/guide/message-channel-intro.md)
- [*Lightning Web Components Dev Guide*: Subscribe and Unsubscribe from a Message Channel](https://developer.salesforce.com/docs/component-library/documentation/en/lwc/lwc.use_message_channel_subscribe)
- [*Aura Component Reference*: Message Channel](https://developer.salesforce.com/docs/component-library/bundle/lightning\:messageChannel/documentation)