Release Notes

March 2026 - Production Environment

New features are production released in a phased rollout to our globally distributed system. Therefore, a feature may be listed here which has not yet reached your workspace(s). However all of these features are available at uat.trade.tt.


Production Start Production Complete Type Component Release Note

03/31/2026

Improvements

FIX Services

Introduced a new value to tag 378 (ExecRestatementReason) in the Execution Reports (35=8).
1. 9003 - Exec Restatement Reason Revived

This reason will be populated in a restated Execution Report whenever a fill is unassigned from a terminal care order.

(Ref 201458)

Version: v305

03/31/2026

05/28/2026

Improvements

Order Entry

Enhanced support for toast message rejects on order entry widgets for synthetic Aggregator orders

(Ref 200207)

03/31/2026

05/28/2026

Improvements

Order Book

We have added a feature within the Order Book widget, where if the last known status of an Order (native or child of synthetic parent) is "Working", and the exchange order connection goes down, the order row will be greyed out. Once the exchange order connection is re-established, the order will be visible and not greyed out.

(Ref 198147)

03/31/2026

05/28/2026

Improvements

Orders

In the Product Grid and Depth widget, when an order is working in an instrument, you can now launch the Floating Order Book (FOB) directly on the bid or ask cell. The FOB will launch based on the method defined in the global Preferences > Orders page in the "Floating Order Book" section.

(Ref 198146)

03/31/2026

05/28/2026

Improvements

Orders

The Depth widget right-click Settings dialog now includes a "Highlight my orders in depth" checkbox item, located immediately above the current "Show tabs" checkbox item. When enabled, this setting will highlight the BidQty or AskQty cells of orders that match the "Current User" on each order. Default colors will be the same as the current yellow background color and black text used for the "Price update highlight background" setting.

(Ref 198145)

03/31/2026

05/28/2026

Improvements

Positions

We have improved the display of EPEX and Nord Pool positions within the MD Trader and Market Grid widgets to display quantity in MWh. This was previously displayed in KWh

(Ref 198144)

03/31/2026

05/28/2026

Improvements

Orders

We have added functionality within the Product Grid widget to "View my orders only" that is currently available in the Market Grid widget. The Product Grid right click Settings dialog now includes a "View my orders only" checkbox item, located immediately above the current "Highlight my own orders in depth" checkbox item. When enabled, the setting filters the Product Grid display for working orders based on the 'Current User' on each order.

(Ref 198141)

03/31/2026

05/28/2026

Improvements

Order Entry

We have added functionality within the Floating Order Book specific to keyboard workflow and price focus. The Floating Order Book (FOB) now responds to keystroke presses, specifically:
 - Esc (Escape) = close the FOB
 - Tab = navigate cells from left to right
 - Enter = submit pending changes
 - Up/Down Arrows = navigate up and down between multiple order rows

When the FOB is launched, focus is set on the price cell of the first order, with the value highlighted and ready to accept modifications from the keyboard. If the price column is not included as one of the default FOB columns, then no cell will have focus upon FOB launch.

(Ref 198139)

03/31/2026

Plan

FIX Services

Production deployment of the v305 Drop Copy and Market Data FIX Services began Mar 27th. The deployment of these services will complete in 4-5 weeks.

Production deployment of the v305 Recovery, Importer and Order Routing FIX services are planned to begin Apr 10th.

This release includes changes to the FIX XML schema files. Clients are strongly encouraged to download and deploy the latest XML schema files from the URL below prior to release: [https://library.tradingtechnologies.com/tt-fix/general/System_Overview.html]

Release Notes for FIX v305 and prior releases can be reviewed at any time by going to [https://library.tradingtechnologies.com/release_notes/]

All TT FIX clients are strongly encouraged to subscribe to the weekly TT System Admin News and Updates email newsletter here: [https://www.tradingtechnologies.com/support-updates/]

(Ref 194377)

Version: v305

Learn More

03/31/2026

Improvements

FIX Services

Introduced a new value for tag 16114 (LinkType).
1. F - Parent Account ID

When an order's account has a parent account, the Execution Reports (35=8) for that order in the FIX Drop Copy and FIX Drop Copy compliance sessions will include the parent account name in tag 16113 (LinkID), with tag 16114 set to 'F' within a LinkGroup.

(Ref 194374)

Version: v305

03/31/2026

Improvements

FIX Services

Introduced tag 54 (side) on the OrderCancelRequest (35=F) messages generated in TT FIX Drop Copy session with compliance feed.

(Ref 194372)

Version: v305

03/24/2026

03/25/2026

Fixes

Exchanges

TT has implemented a temporary fix restoring OTC/Wholesale order entry for delta-neutral strategies on Euronext. Please note that OTC orders for the following combination types remain suspended until further notice: ICS 1 Sided, ICS 2 Sided, Spread vs Call/Put, and Ratio Spread Option.

(Ref 204991)

03/20/2026

Improvements

Exchanges

TT has added support for displaying any block trades with the new block trade types of Block Standard, Block Historical and Block NFC Auction on the TT Time and Sales Widget. All these will be displayed with Type = Block on this widget.

(Ref 204640)

03/13/2026

Improvements

Exchanges

As of February 27, TT is now processing non-tradable and non-hedgable market data on Futures for the ICE and ICE_L markets, for reference by the corresponding Options contracts in order to ensure TVTIC compliance.

In the TTW Market Grid, these Futures will appear with a red background to indicate that they are non-tradable, and the Status will be displayed as Unknown. This change does not impact existing ICE or ICE_L contracts, or alter their current behavior.

(Ref 204442)

03/13/2026

Improvements

FIX Services

The description of tag 393 (TotalNumSecurities) will be updated in the TT FIX Library. There is no change to existing functionality or behavior of this tag.

New description: Tag 393 indicates the total number of leg fill messages associated with a spread summary. For certain exchanges, this value may be 0 for outrights. TT forwards this value as received from the exchange, without modification.

(Ref 204316)

03/13/2026

03/13/2026

Improvements

Settings

Added a new "Enable Exception Management" setting to the FIX Order Routing session configuration in TT Setup. When enabled, most inbound FIX care orders with errors will no longer result in immediate client rejections. Instead, these orders will be processed and displayed in the TT front-end within a new "Order Exceptions" widget. This widget provides "Repair" or "Reject" options for direct management of these error orders. Note that front-end users must have OMS Advanced features enabled in Setup to access this functionality. See our documentation for more details.

(Ref 198101)

03/07/2026

Improvements

Exchanges

A separate Market Data Subscription of 'Power Derivatives' has been added on TT User Setup. Any customers interested in trading the Nordic Power Derivatives, that were recently introduced on Euronext, should have this permission enabled.
This change is currently provided only to enable the customers to do the required configuration before the actual migration date of these contracts from Nasdaq to Euronext (which will happen on 15 Mar). Enabling or disabling this permission will not have any effect till 15 Mar. Post 15 Mar, only those customers that have this Power Derivatives subscription enabled will be able to view and trade these power derivatives on Euronext through TT.

(Ref 202335)

03/06/2026

03/06/2026

Improvements

Excel Linking

We have released a new v26.0 of the TT Excel Add-In that includes an updated SSL certificate that expires 19 February 2027. No code changes are included other than the updated certificate.

(Ref 204326)

03/06/2026

03/06/2026

Improvements

Trade App on TT (desktop)

We have released a new TT Desktop installer package v26.0.0. No code changes are included in this release, however this package includes the new TT Excel Add-In v26.0 which contains an updated SSL certificate that expires 19 February 2027.

(Ref 204322)

03/06/2026

Improvements

Trade Surveillance

14.3.1
Enhancements

Update to DealTime Model
The model has been updated to change the threshold to 15mins from 5mins for Complex Strategies involving block trades.
What the model will do now is for every 5 minute window instrument block trade, it will check to see if the same trader had another block transaction at the exact same time as the first one, and if so, have the model use the 15 minute window instead of 5 minutes. This only applies to a subset of products:
Brent Crude Futures (B) Low Sulphur Gasoil Futures (G) WTI Crude Futures (T) Midland WTI American Gulf Coast Futures (HOU) Heating Oil Futures (O) RBOB Gasoline Futures (N) NYH Heating Oil Last Day Future (OLD) (RBOB) Gasoline Last Day Future (NLD) WTI Crude Oil Last Day Future (WLD) Permian WTI Storage Futures (HOS) NYH ULSD Futures (O62) NYH ULSHO Futures (O67)

Utilising ICE product schedule information for better detection of abusive messaging
We are now excluding events that are outside the trading hours for ICE products so that we minimize false abusive messaging clusters.
False clusters, previously generated when FIX messages were replayed upon session reconnects or restarts, are now prevented.

Bug Fixes

Fixed Thread Exhaustion and on heap memory exhaustion from TTUS Client Library Updates
Addressed a memory leak within the TTUS Client Query Service on AP Northeast view servers, which was causing application crashes and restarts. Additionally, event deduplication has been implemented to reduce server congestion.

(Ref 202363)

03/04/2026

Improvements

FIX Services

U.S. Daylight Saving Time (DST) begins March 8 at 2:00 AM local time.

TT FIX services reset weekly on Saturdays at 22:00 UTC by default. If FIX sessions utilize the optional Reset Schedule in Setup to perform a daily reset or change TT's weekly default, please note that these times are configured in UTC. If users desire to maintain the same daily reset time relative to their local time zone, they may need to adjust the UTC time Reset Schedule in Setup.

For example, if a FIX client application configured a daily reset time in Setup to be performed at 22:45 UTC, the session would be reset at 16:45 CST prior to Daylight Savings Time going into effect. When DST begins, the reset would occur at 17:45 CDT if no action was taken to adjust the Reset Schedule.

FIX clients connected to FIX v291 or higher have the option to specify a time zone other than UTC in the Session Reset Schedule in Setup. Configuring a time zone other than UTC eliminates the need to adjust configuration for seasonal time changes.

(Ref 202141)

Version: v305