---
title: "Day and day-ahead indicated imbalance (IMBALNGC)"
method: GET
path: "/datasets/IMBALNGC"
tags: ["BMRS Datasets"]
---

# Day and day-ahead indicated imbalance (IMBALNGC)

`GET /datasets/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 Transmission System Demand forecast made by the System Operator.
            
This API endpoint provides a maximum data output range of 1 day.

## Query parameters

- `boundary` string
- `publishDateTimeFrom` string, date-time
- `publishDateTimeTo` string, date-time
- `format` 'json' | 'xml' | 'csv'

## Response `200`

Data retrieved

- InsightsApiModelsResponsesDatasetResponse1InsightsApiModelsResponsesIndicatedForecastDatasetRowsIndicatedImbalance
  - `data` InsightsApiModelsResponsesIndicatedForecastDatasetRowsIndicatedImbalance[], nullable
    - `dataset` string, nullable
    - `imbalance` integer, nullable
    - `publishTime` string, date-time
    - `startTime` string, date-time
    - `settlementDate` string, date
    - `settlementPeriod` integer
    - `boundary` string, nullable

## Other responses

- `400` — Error with query parameters - see response for details
- `429` — Too many requests
- `500` — Server error - please try again later

---

[API](https://skmtc.net/elexon/apis/bmrs-insights.md) · [All operations](https://skmtc.net/elexon/apis/bmrs-insights/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/elexon/bmrs-insights/versions/d94e9edb295e/schema)