OCA Types | Interactive Brokers

Via the IBApi.Order.OcaType attribute, the way in which remaining orders should be handled after an execution can be configured as indicated in the table.

Value	Description
1	Cancel all remaining orders with block.*
2	Remaining orders are proportionately reduced in size with block.*
3	Remaining orders are proportionately reduced in size with no block.

Note*: if you use a value “with block” it gives the order overfill protection. This means that only one order in the group will be routed at a time to remove the possibility of an overfill. Click here for further discussion of OCA orders.

Multiple OCA types cannot be used in a single OCA Group.