Support Board
Date/Time: Tue, 10 Feb 2026 20:44:30 +0000
Post From: IBKR API v44 changes
| [2026-02-10 13:28:15] |
| User512353 - Posts: 121 |
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IBKR announced the following changes for IBKR API version 10.44: ======================================================================================================================================== What Is Happening? Beginning with the release of Trader Workstation and IBKR Gateway 10.44, the “LAST_SIZE” and “DELAYED_LAST_SIZE” tick type delivered to the EWrapper.tickSize size argument will act as a Decimal-type value instead of an Integer-type value. Why Is This Happening? This change will allow Interactive Brokers to pass fractional trade sizes when requesting market data with EClient.reqMktData. Who Is Affected? Anyone who updates their TWS API version to 10.44 and above. When Does This Take Effect? The LAST_SIZE and DELAYED_LAST_SIZE values will deliver fractional sizes beginning February 23, 2026. How Should You Prepare? In code that implements EWrapper.tickSize() alongside EClient.reqMktData(), ensure that the final variable, size, can accept a Decimal value. In addition, ensure that any internal systems that utilize LAST_SIZE (ticktype 5) or DELAYED_LAST_SIZE (ticktype 76) can accept a Decimal variable. ======================================================================================================================================== Can you please comment whether these changes affect SC operation with the IBKR API? |