Wholesale information and trading system (WITS)
The wholesale information and trading system (we call it WITS for short) is used by industry participants to upload their bids and offers.
A free version of WITS makes information on pricing, demand and hydro lake levels available to any interested party. If you register on the WITS data website, you can also access additional features, such as the ability to save customised selections.
WITS also provides pricing, scheduling and other market data.
The platform is run by NZX, as the contracted WITS manager. More information about the WITS manager is available on the Wholesale information and trading system – WITS manager website.
What WITS does
WITS is designed to act as a central facility for the receiving and publishing of information between industry participants in the wholesale electricity market:
- Purchasers and generators send their bids and offers for energy and reserves to WITS. The bids and offers are validated and sent to the system operator for use in the scheduling and dispatch process.
- When the electricity prices (forecast prices) and quantities have been calculated, the system operator sends these back to WITS to be published.
- The pricing manager sends provisional, interim and final prices to WITS for publication to the market.
We also receive compliance information from WITS. WITS processes and requirements are set out in Part 13 of the Code.
WITS access policy and terms and conditions of access (WITS access policy Appendix A)
Last updated: 16th April 2019
How to apply to access WITS
Some information on WITS is only available to industry participants who trade in the electricity wholesale market or by special arrangement with NZX.
Industry participants wanting access to the trader functions of WITS must apply directly to us using the application form. All publicly available information can be accessed via the WITS data website - https://www.electricityinfo.co.nz/ (no application is necessary to access WITS data).
New users must also sign a Use of System Agreement with NXZ.
Last updated: 19th August 2016
Return the completed form to our market operations team with the subject header 'WITS application'.