and can be used like NT7's old Order.Token.
[That is, the OrderId is permanent and can be used to track orders, such as when one
needs to track orders using the Account.OrderUpdate event handler, such as might be
done in a trade copier. A permanent artifact inside each Order object that is guaranteed
to never change is very important.]
Ok, but ...
Why does the documentation for Order say the OrderId value can change?
Is the documentation correct?
Under what circumstances does the value of OrderId change?
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