Our SMART website may be unavailable for a few minutes on July 1st 2025 between 11:00 and 11:30 AM due to an IT update

We would like to inform you that we are rebranding our SMART website from GRTgaz to NaTran on July 1st, 2025 at 11:00 AM.

We are replacing the word GRTgaz with the word NaTran in many places on our SMART website, which notably impacts Excel exports. Certain cell contents in CSV and XLS files, such as zone selection names, are affected, as are column headings and sheet names.

The URLs/APIs to be used are smart.natrangroupe.com, although the current URLs/APIs smart.grtgaz.com will remain valid temporarily.

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Definitions
Balancing - Price - since 2014 1st May  Last refresh :

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Period
2025
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Export format(s)

Data associated with the obsolete meshes, which is no longer displayed on the portal, remain available via the Services>Data request function.

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NaTran action : Purchase if the network' imbalance is due to a lack of gas. Purchase if the network' imbalance is due to an excess of gas.

NaTran' needs : Represents the balancing needs of NaTran.

Daily average price : Energy weighted average price of all the gas trades of title products in respect of a given gasday carried out on the trading platform managed by Powernext

Quantity transacted : Quantity of gas traded by NaTran with the market for balancing needs.

Marginal buying price : Maximum between the highest TSO buying intervention and the average price + 2.5%

Marginal selling price : Minimum between the lowest TSO selling intervention and the average price - 2.5%