ACER To Decide On Changes To The Methodology For EU Day-Ahead And Intraday Market Algorithms

On 21 July 2026, ACER received a proposal from all nominated electricity market operators (NEMOs) to amend the methodology for the price coupling, continuous trading matching and intraday auction algorithms.

What is the methodology about?

Established under the Capacity Allocation and Congestion Management (CACM) Regulation, the methodology provides a common framework for the algorithms used to simultaneously match electricity market orders and allocate cross-zonal capacities in Europe’s day-ahead and intraday markets. It defines common requirements, timelines and implementation deadlines.

Why amend the methodology? 

NEMOs propose amendments to the methodology to enable more efficient cross-border electricity exchanges, deliver greater welfare and maintain the secure operation of the power system by:

• enabling the introduction of three intraday auctions using flow-based capacity calculation by updating the timings and delivery of intraday auction results;

• setting a concrete implementation deadline for flow-based allocation in intraday auctions; and

• amending the relevant deadline for publishing the single day-ahead coupling results.

What are the next steps? 

ACER expects to decide on the methodology by 21 January 2027. 

Interested stakeholders are invited to share their views on the topic by 31 August 2026 via ACER-ELE-2026-006@acer.europa.eu.