Carbon User Guide

Carbon is designed and built by the in-house technology team at Marex and is part of the Neon suite of applications. Carbon provides access to the New Zealand carbon emissions trading scheme (NZ ETS) for Marex clients.

Accessible on desktop, the app provides access to trade NZU (New Zealand Units).

Accessing Neon Carbon

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How to log in

Log into Neon as usual at

From the Neon dashboard, find the Carbon app icon in Your Apps at the top of the screen. If you require access to be granted, find Neon Carbon on the app listing below, and choose "Register your interest" for Neon Carbon. A member of the Neon Concierge team will be in touch to confirm your details.

Navigating Neon Carbon

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Live Markets

This panel appears at the top of the app, and collates all markets currently accessible (open for trading, and applicable) for the logged in user.

Each market can be collapsed or expanded to show current trades and orders. Only products with current trades or orders will populate on this screen.

It can be combined with any other screen. Drag each panel to resize it.

This will not be saved between sessions.


All available products are listed on the Trades grid.

The grid is sorted by status: Approved, Rejected, Blank - Time: Earliest > Latest

Trades can be exported by clicking on Export button.

Making a trade

To make a trade, click the line item of the product you wish to trade, and complete the dialog box. Up to 3 bids appear on the grid on each product on each side (buy/ sell). Additional bids will appear in a separate order stacker.

Trade Notification

A ‘Trade notification’ pops up when you have made a trade. These can be disabled within the settings. Use the 'x' button to close the popup; if you don’t close them, the notifications appear in a list.

Displayed within the notification:

  • Background: Blue = Bought, Red = Sold
  • Bought or Sold
  • Instrument
  • If Bought, 'bought from' Company
  • If Sold, 'sold to' Company
  • Qty and Price e.g. 30/0.00
  • Trade Time

Trade rules

The app will prevent you from trading against your own order or company order. If you attempt this, you will be presented with this error.

Trades - filtering

Users can filter to display 'Only my trades'. This will filter the grid to trade made by the current user and those made by their Company/ies.

Users can filter the Trade by ‘From’ and ‘To’ date.

Filter by product: products shown are based on the available trades present in grid.

Filter by ‘Find’: free text field.

The Trades grid can display up to 2000 trades.


The Orders screen lists all current active and part filled trades. If you are part of a company with more than one trader, you can see your colleagues trades as well. Colleagues orders will be in yellow, your own orders in blue.

Clicking on each line item opens the ‘revise’ dialog. Clicking the 'X' button on each line item opens the ‘confirm cancel order’ dialog.

Pulling from Orders tab

Pull All - the ‘pull confirmation’ dialog will appear first to confirm Pull All.

Pull Selected

Choose the orders you wish to pull from the checkbox on the left hand side of the list of orders. The ‘Pull Selected’ button will then be enabled, and displays a count of number of selected orders. A confirmation dialog will appear first to confirm ‘pull selected’.


Filter the Orders grid by any of your viewable columns. For example:

  • Off screen: show all orders with Off screen flag enable
  • Iceberg: show all orders with Iceberg flag enable


Use the ‘Export’ button at the far right hand side to download the Orders grid in .xlsx (MS Excel) format.


The Settle screen shows the closing price on all filled orders.
Settle column: Live settlements sent at close.
Settle tab: Latest settlement price for the filtered date selected.
Filter by date: User can filter the settlement tab by date using the Settlement Date picker.


Export the Settlement table by clicking on the ‘Export’ button to download a .xls (MS Excel) file titled 'Settle dd-mm-yyyy.xlsx' with dd-mm-yyyy being the settlement date selected.


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User settings menu

The settings menu is found at the top right of the screen. Choose the cog wheel to open the menu.

Show Company Shortcodes: Once enabled, Company Shortcodes displayed. The display is blank if disabled.

Show Flag for Partial Orders: If orders are not complete, a flag will be shown against the order.

Audible Alerts: Allows sounds to be played for New / Modify Orders, Trades and Order Rejection.

Trade Notifications: Toggle on or off to allow the system to visually notify you of trades made.

Common errors on order tickets

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Order rejected to prevent company crossing

  • Trader attempting to trade against own implied price
  • New Order placed against Own order which would trade
  • New Order placed against My Company order which would trade

Failed to add order: Invalid clearing account code for user

Not clearing account for User within Admin. Please contact the team.

Price must be 2 decimal places for NZUs

Order exceeds Decimal Place setting.

Buy/Sell button disabled

  • No company assigned to User
  • Qty less than Min Qty
  • Qty more than Max Qty
  • Price less than Min Price
  • Price more than Max Price