Receive null value

In orderUpdate callback I receive ParenOrderID as null , why ?
In which situation we receive null value in ParentOrderID? (as if the orderUpdate receive order is already the parentOrder than ParenOrderID should be 0 right ? )

Sometime we also receive TickData LastTradeTIme as null , why ?
  • sujith
    A parent order id is a string and a non-second leg order doesn't have a parent order id. The non-second leg includes a regular order or a first leg order.

    The last traded time is in the full mode tick only. You won't see data if you have subscribed to LTP mode or Quote mode.
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