---
title: "Day and Day-Ahead Indicated Imbalance"
method: GET
path: "/gb/elexon/forecasts/imbalngc"
tags: ["Elexon"]
---

# Day and Day-Ahead Indicated Imbalance

`GET /gb/elexon/forecasts/imbalngc`

This endpoint provides the Indicated Imbalance. Data is received by daily by midday from NGESO. Expressed as an average MW value for each Settlement period. The Indicated Imbalance forecast for each period is the difference between the sum of the PNs submitted for generation BM Units (i.e. the Indicated Generation,and the National Demand Forecast made by the System Operator.

## Query parameters

- `publish_date_from` string, date-time, required
- `publish_date_to` string, date-time, required
- `limit` integer
- `offset` integer
- `timezone` 'UTC' | 'Europe/Berlin' | 'Europe/London' | 'America/New_York' | 'America/Chicago' | 'America/Los_Angeles'

## Response `200`

Success

- object
  - `count` integer, required
  - `next` string, uri, nullable
  - `previous` string, uri, nullable
  - `results` ElexonIMBALNGC[], required
    - `dataset` string
    - `imbalance` integer
    - `publishTime` string, date-time
    - `startTime` string, date-time
    - `settlementDate` string, date
    - `settlementPeriod` integer
    - `boundary` string

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden
- `404` — Not Found
- `429` — Too Many Requests

---

[API](https://skmtc.net/modoenergy/apis/modo-energy-api.md) · [All operations](https://skmtc.net/modoenergy/apis/modo-energy-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/modoenergy/modo-energy-api/revisions/6c4b83d3fc12/schema)