IESO HOEP (pre-2025 market)

The Hourly Ontario Energy Price and its pre-dispatch projections, with the old market's operating-reserve prices, from 2002 to the market renewal on 2025-05-01.

Prices data IESO market

Query with the agent

Native record

hour

hourly, ended 2025-04-30 publication cadence

Evidence

Observed market data

Published observations from the named source

Time basis

Point-in-time records

UTC · event_time

Overview

The Hourly Ontario Energy Price and its pre-dispatch projections, with the old market's operating-reserve prices, from 2002 to the market renewal on 2025-05-01.

Query contract

Preserve one canonical row per (event_time) before aggregating.

Analysis rules

Rows repeat across polls: dedupe with argMax(value, ingested_at) per key.

Interpretation

Ontario's renewed market began 2025-05-01: LMPs exist from then. Before it, the uniform HOEP and MCP apply (ieso.hoep_historical, ieso.mcp_historical). Never join the two epochs into one series.
Prices are Canadian dollars per MWh. Never add, rank or average them with US-dollar prices without a dated exchange rate, and say which rate was used.

Access

Need the full history of this dataset in Snowflake, Databricks or your own storage? Data services delivers it on a schedule.

Schema9

Column

Type

event_timeDateTime64(6, 'UTC')

hoepNullable(Float64)

hour1_predispatchNullable(Float64)

hour2_predispatchNullable(Float64)

hour3_predispatchNullable(Float64)

or_10min_syncNullable(Float64)

or_10min_non_syncNullable(Float64)

or_30minNullable(Float64)

ingested_atDateTime64(6, 'UTC')

Sample data

event_time	hoep	hour1_predispatch	hour2_predispatch	hour3_predispatch	or_10min_sync	or_10min_non_sync	or_30min	ingested_at
2025-05-01 04:00:00.000000	14.34	14.34	14.35	14.4	9.75	9.75	0.1	2026-07-19 08:40:52.795730
2025-05-01 04:00:00.000000	14.34	14.34	14.35	14.4	9.75	9.75	0.1	2026-07-17 08:41:16.160160
2025-05-01 03:00:00.000000	36.57	37.04	36.76	36.76	17.2	17.2	0.01	2026-07-19 08:40:52.795730
2025-05-01 03:00:00.000000	36.57	37.04	36.76	36.76	17.2	17.2	0.01	2026-07-17 08:41:16.160160
2025-05-01 02:00:00.000000	38.12	38.09	38.1	38.1	16.44	16.44	0.01	2026-07-19 08:40:52.795730
2025-05-01 02:00:00.000000	38.12	38.09	38.1	38.1	16.44	16.44	0.01	2026-07-17 08:41:16.160160
2025-05-01 01:00:00.000000	38.12	38.16	38.16	38.16	8.52	8.52	0.01	2026-07-19 08:40:52.795730
2025-05-01 01:00:00.000000	38.12	38.16	38.16	38.16	8.52	8.52	0.01	2026-07-17 08:41:16.160160
2025-05-01 00:00:00.000000	41.43	45.13	45.13	49.05	4.41	4.41	0.01	2026-07-19 08:40:52.795730
2025-05-01 00:00:00.000000	41.43	45.13	45.13	49.05	4.41	4.41	0.01	2026-07-17 08:41:16.160160
2025-04-30 23:00:00.000000	34.38	36.39	35.22	34.55	19.29	19.29	0.01	2026-07-19 08:40:52.795730
2025-04-30 23:00:00.000000	34.38	36.39	35.22	34.55	19.29	19.29	0.01	2026-07-17 08:41:16.160160
2025-04-30 22:00:00.000000	35.68	35.03	33.47	29.92	17.57	17.57	0.01	2026-07-19 08:40:52.795730
2025-04-30 22:00:00.000000	35.68	35.03	33.47	29.92	17.57	17.57	0.01	2026-07-17 08:41:16.160160
2025-04-30 21:00:00.000000	37.03	36.98	36.41	34.69	11.26	11.26	0.02	2026-07-19 08:40:52.795730
2025-04-30 21:00:00.000000	37.03	36.98	36.41	34.69	11.26	11.26	0.02	2026-07-17 08:41:16.160160
2025-04-30 20:00:00.000000	35.3	34.51	34.69	24.17	14.38	14.38	0.02	2026-07-19 08:40:52.795730
2025-04-30 20:00:00.000000	35.3	34.51	34.69	24.17	14.38	14.38	0.02	2026-07-17 08:41:16.160160
2025-04-30 19:00:00.000000	15.61	26.33	25.55	21.98	10.78	10.78	0.09	2026-07-19 08:40:52.795730
2025-04-30 19:00:00.000000	15.61	26.33	25.55	21.98	10.78	10.78	0.09	2026-07-17 08:41:16.160160
2025-04-30 18:00:00.000000	14.37	35.65	35.5	24.16	1.64	1.64	0.1	2026-07-19 08:40:52.795730
2025-04-30 18:00:00.000000	14.37	35.65	35.5	24.16	1.64	1.64	0.1	2026-07-17 08:41:16.160160
2025-04-30 17:00:00.000000	13.71	35	32.05	22.22	9.75	9.75	0.1	2026-07-19 08:40:52.795730
2025-04-30 17:00:00.000000	13.71	35	32.05	22.22	9.75	9.75	0.1	2026-07-17 08:41:16.160160
2025-04-30 16:00:00.000000	18.81	18	18	34.69	10.11	10.11	0.08	2026-07-19 08:40:52.795730

Coverage

No time-indexed data — coverage isn’t applicable to this dataset.

Related prices data

Related prices data
Dataset	Description
IESO Intertie PricesIESO · five-minute real-time; hourly day-ahead	LMPs at Ontario's intertie zones with neighbouring markets.
IESO Nodal LMPsIESO · five-minute real-time; hourly day-ahead and pre-dispatch	Locational marginal prices at every IESO pricing location in each market run, with loss and congestion components. About a thousand locations; none has a verified map position here.
IESO Ontario Zonal PriceIESO · five-minute real-time; hourly day-ahead and pre-dispatch	The Ontario zonal price, the load-weighted price Ontario's non-dispatchable load pays, in each market run, with loss and congestion components. Ontario's reference price.
IESO Virtual Zone PricesIESO · five-minute real-time; hourly day-ahead	Prices in IESO's virtual transaction zones, where virtual bids and offers settle.