Trader Workstation (TWS) 2026 API Production Release Notes

10.45

HedgeMaxSize Parameter

Added hedgeMaxSize parameter to order.

One-Time Disabling

Trader Workstation and IB Gateway 10.45 will clear “Enable ActiveX and Socket Clients” and “Allow connections from localhost only.”

If these settings were cleared between upgrades, the user will be notified through a pop-up directing users to accept the changes or view the settings located in Global Configuration.

10.44

Support for Update-Config Request / Response

Added support for update-config request/response

Support for Fractional Last Sizes

Added support of fractional last sizes in tickSize response

10.43

Submit Order on Mobile App

Stage orders from API and submit from your favorite mobile IBKR app

Support for Get-Config Request / Response

Added support for get-config request/response