IBKR APIs
A new update will be releasing a new TWS and API version on 2026-02-23. This update will contain a change where the Delayed_Last_Size (tick type 71) and Last_Size (tick type 5) returned to tickSize will now return a the size argument as a Decimal value rather than an Integer value as it had historically. This change is only going to roll out to users on the 10.44 and higher API version. Implementations below 10.44 will not observe any change.

