February 2026 - UAT Environment

UAT Complete	Production Start	Production Complete	Type	Component	Release Note
02/26/2026			Improvements	FIX Services	Introduced support to facilitate unique instrument identification in scenarios where options share identical strike prices, types, and maturities, but differ by exercise style: 1. Tag 1194 (ExerciseStyle): Available for primary instrument identification. 2. Tag 1420 (LegExerciseStyle): Available for individual leg identification within multileg instruments. (Ref 194184) Version: v305
02/25/2026			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
02/25/2026			Plan	FIX Services	UAT deployment of the v305 Market Data, Recovery and Inbound Drop Copy FIX Services began Feb 24th. UAT deployment dates for the v305 FIX Order Routing and Drop Copy will be shared in the coming days. Production deployment of these services will begin in 4-5 weeks. 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
02/25/2026			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 compliance session will include the parent account name in tag 16113 (LinkID), with tag 16114 set to 'F' within a LinkGroup. (Ref 194374) Version: v305
02/25/2026			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
02/25/2026			Improvements	FIX Services	Introduced 3 new values for tag 8000 (SMPInstruction) to represent market wide SMP actions which is applicable for Eurex only. 1. f - SMP Instruction Type Market Wide Cancel Aggressor 2. g - SMP Instruction Type Market Wide Cancel Resting 3. h - SMP Instruction Type Market Wide Decrement Leaves Qty Users can test the values along with the upcoming Eurex/EEX/Nodal upgrades. Refer weekly TT System Admin News and Updates email newsletter here: [https://www.tradingtechnologies.com/support-updates/] (Ref 194370) Version: v305
02/19/2026			Fixes	Orders	Fixed an issue where leg order quantities and prices are incorrectly displayed when sending care orders to Blocktrader for Eurex strategies. (Ref 200575)
02/19/2026			Fixes	MD Trader	Fixed an issue where the MD Trader order quantity would not save and restore with the workspace unless a max quantity was also set in Order Profiles. (Ref 200572)
02/19/2026			Improvements	Fills	In the Orders and Fills widget (OFW), you can now unassign fills that have not yet been released from a locked care order. Previously the unassign fills feature was only available for fills that had been released. (Ref 200571)
02/19/2026			Improvements	Order Book	The Order Book section of the global Preferences > Hotkeys configuration dialog now include hotkey items for the following OMS functions (with their default keystroke combination): - Claim F2 - Unclaim Alt + F2 - Lock Ctrl + L - Unlock Alt + L - Combine F7 - Bulk Ctrl + B - Unbulk Alt + B - Stitch Ctrl + H - Unstitch Alt + H - Split Ctrl + T - Unsplit Alt + T - Algo Dashboard Alt + A - Release Alt + R Each of these hotkeys initiate the same action as selecting their equivalent right-click menu item or toolbar button action. Pressing these hotkeys will execute the action only when focus is on an Order Book or an OFW. Pressing the hotkey will not execute when focus is not on an OB/OFW. (Ref 200570)
02/19/2026			Improvements	Order Book	To quickly apply OMS features with a single click without having to right click and navigate the context menu to use those features, the Order Book and OFW toolbar now includes optional buttons for the following functions: Bulk/Unbulk, Stitch/Unstitch, Split/Unsplit, Lock, Unlock, Combine, Same Order Type, Release, Assign (drop down with Orders and Fills as options), Unassign (drop down with Orders and Fills as options). The new buttons are OFF (hidden) by default. When enabled on the toolbar, each button will enable, disable and function the same as their related right click menu item. As part of this work, the "Modify Algo" toolbar button – which previously launched the Algo Parameter pane for a single order – now also enables when selecting multiple algo orders, and when clicked opens them in the Algo Dashboard (same as when using the right click menu of Open > Algo Dashboard). Also as part of this work, the OB toolbar button configuration dialog now behaves similar to how the "Edit Columns" configuration dialog behaves. Specifically, not only can toolbar buttons be checked/unchecked for visibility, but their horizontal locations on the toolbar can be rearranged via drag-and-drop within the configuration dialog. (Ref 200569)
02/19/2026			Improvements	Orders	A care order originator can submit a change to reduce the order quantity of a claimed and locked care order, pending approval by the execution trader. However, if the order has fills, the proposed order quantity may be less than the amount of unreleased fills (because the originator is unaware of the fills when the order is locked). We now warn you that the proposed order quantity is below the fill quantity of the unreleased fills when you attempt to approve the quantity reduction. This helps the execution trader decide whether to inform the customer and reject the request, or approve the reduction and keep the extra fills for internal inventory. (Ref 200568)
02/19/2026			Improvements	Orders	As a general rule we prevent users from attempting to perform OMS actions that are not supported. As part of this effort, the Order Book and OFW does not allow you to attempt the following actions: (1) You cannot "Unbulk" a bulked order with fills (the fills must be unassigned from the bulk before it can be unbulked). (2) You cannot "Unstitch" a stitched order with fills (the fills must be unassigned from the stitch before it can be unstitched). (3) You cannot use the "Split" feature on: (a) Care orders with working child orders, (b) Bulked orders (an order must be removed from a bulk before it can be split), (c) Stitched orders, and (d) previously Split orders (a care order can only be split once). (Ref 200566)
02/19/2026			Improvements	Fills	Currently within the Orders and Fills widget (OFW) you can assign fills to care orders. While this technically works correctly, you have to select the fills individually, and in practice an execution trader may have hundreds of partial fills on large orders that they want to assign to a care order. To improve this feature, the "Assign Fills" panel header toolbar in the OFW now displays a "By order" checkbox. When unchecked OFF, the fill records displayed in the panel behave as per current behavior as individual fill records. These fill records may be partial fills or full fills. When checked ON, the fill records in the panel "roll up" and display grouped together under their same order_id, similar to how the "By Order" display mode behaves in the Fills widget. When in this "By order" mode, selecting a parent fill order record (with one selection) and clicking the "Assign fills to order" button will assign all of that orders individual fills to the care order, the same as if you had selected all of the partial fills themselves individually. (Ref 200563)
02/19/2026			Improvements	Fills	Currently within the Orders and Fills widget (OFW) you can unassign fills on care orders for the current session. However, the unassign fills feature is not available if a care order is fully filled and closed (aka "Terminal"). We have removed this restriction and now support unassigning fills on fully filled care orders. After the fills are unassigned, that care order appears as a working order in the Order Book and you can add new child orders and/or assign new fills to that order. Also, the fills that have been unassigned in this process become available to be assigned to other care orders. (Ref 200562)
02/19/2026			Fixes	Aggregator	Fixed an issue that prevented risk reject "toast" messages on Aggregator orders from populating in the Order Ticket and MD Trader. (Ref 200559)
02/19/2026			Improvements	Order Entry	Normally when the Order Ticket is configured in single B/S button "Broker" mode, it displays the legs on multileg instruments. However, we have modified this behavior when seeded with an aggregated spot energy instrument (which have two "legs", one from EPEX and one from Nord Pool) to not display the "legs" because these aggregated instruments are essentially a single synthetic instrument. (Ref 200558)
02/19/2026			Improvements	Market Grid	When opening an FX instrument in Market Grid, a price subscription will be made using the default account defined in Preferences > Accounts for the associated multi stream market. A new "Account" column has been added to Market Grid, which will initially be populated with the default account. In this column you can select a different account to receive prices associated with that account (e.g., connection). All Market Grid columns will reflect the value associated with the chosen account. For example, if a user chooses account A, the Position column will reflect only the position for account A. The same goes for columns such as High, Low, etc. For non-FX instruments, changing the account will have no impact. To display different price streams for FX instruments, multiple instances of the same instrument can be added in a Market Grid with the same or different accounts. (Ref 200555)
02/19/2026			Improvements	Market Data	The TT system generally supports a single price stream per user and prevents a user from seeing different order books for the same instrument. We have enhanced our system to now support multiple price streams per user. An account will only have a single price stream configured, but a user may have multiple accounts configured each with a connection to an FX market (that supports price streams). This allows users to see and trade on different books for the same instrument. Prices are required for direct as well as indirect purposes in the TT front end. For example, a user can choose an instrument for which they wish to view prices directly. Prices can also be required for indirect reasons, such as P&L calculations. For this reason, TT allows you to define a "default" account (e.g., connection) in global Preferences > Accounts for each "Multi Stream" market, e.g., FX, they have permissions to trade. (Ref 200549)
02/19/2026			Improvements	Order Entry	The Order Profiles widget now includes 3rd party algos as order types when defining rules. Specifically, the 3rd party algos for a given provider are included in the Order Type drop down list when the user selects an account that has a connection to this provider. Any templates for these algos are also available to select in the "Template" field. (Ref 200548)
02/19/2026	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)
02/19/2026	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)
02/19/2026	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)
02/19/2026	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)
02/19/2026	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)
02/19/2026	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)
02/12/2026			Plan	FIX Services	Effective February 12, 2026, LSEG will revise the RICs for all CBOT Reduced Tick (RT) Spread contracts. TT will begin supporting the updated RICs in Production on March 15, 2026. Testing is currently available in UAT. Example of the RIC change: Old: AULRTU25-H26 New: AULU25-H26 The new format removes the “RT” identifier from the RIC. Impacted products: SI, ZN, UB, PA, ZB, TN, 20U, MGE, 40U, 50U, TWE, DVE, 30U Starting March 15, 2026, clients must use the revised RIC format when submitting orders through TT. (Ref 200223)

Release Notes

February 2026 - UAT Environment