Trader Workstation (TWS) 2026 API Production Release Notes

10.47

De-Supported Fundamentals Data Request

Removed methods: reqFundamentalData, reqFundamentalsDataProtoBuf, cancelFundamentalData, cancelFundamentalsDataProtoBuf

Removed callbacks: fundamentalData, fundamentalsDataProtoBuf

Removed tick type: FUNDAMENTAL_RATIOS = 47

Updated IB ALGO samples

We have updated the IB ALGO samples.

New API Setting to Distinguish Per-Currency Account Values

Added a new option in the API Settings panel: "Prepend '$LEDGER-' prefix to per-currency account values"

When subscribing to account data updates via the API, some key names (e.g., "AccruedCash") appear at both the account level and the per-currency level. Previously, API clients had no reliable way to distinguish between these two data types based on the key name alone. Enabling this new setting will prepend "$LEDGER-" to all per-currency value keys (e.g., "$LEDGER-CashBalance"), allowing client applications to unambiguously identify the source and scope of each value.

This setting is disabled by default for upgrading users to maintain backward compatibility with existing API client implementations. It is enabled by default for new users.

Affected API functions: reqAccountUpdates, reqAccountUpdatesMulti

Affected callbacks: updateAccountValue

10.46

New Tick Types Added

Added new tick types: oddLotBid=105, oddLotAsk=106, oddLotBidSize=107, oddLotAskSize=108, oddLotBidExch=109, oddLotAskExch=110

Support of Requesting Generic Tick

Added support of requesting new generic tick 787

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