Block

The Block attribute is used for large volume option orders on ISE that consist of at least 50 contracts.

More on Block Orders

More on Supported exchanges

Python

Java

C++

C#

VB.NET

order = Order()
order.action = action
order.orderType = "LMT"
order.totalQuantity = quantity#Large volumes!
order.lmtPrice = price
order.blockOrder = True