For example I am put a limit order of size 10 at top bid. moments later, my algorithm detects we should have size of 50 here. So we request a update on this order.

My question is, will we lose the current queue position due to this update?


1 Answer 1


Yes. Increasing the size of an order is like cancelling and reinserting it. You lose queue priority and insert behind the other orders.

  • 3
    $\begingroup$ It depends on exactly which market we're talking about. But in general with price/time priority markets this is true. $\endgroup$ Commented Feb 12, 2014 at 22:43
  • $\begingroup$ @LouisMarascio, I wonder, is there any exchange that allows to keep the queue in this case? $\endgroup$
    – Serg
    Commented Feb 13, 2014 at 12:50
  • $\begingroup$ What if my update action is actually to reduce the quantity? $\endgroup$
    – cynric
    Commented Feb 14, 2014 at 19:54
  • $\begingroup$ You do not lose queue priority then. But check for the exchange and market you are interested in. This might differ from exchange to exchange and from market to market. $\endgroup$
    – Konsta
    Commented Feb 15, 2014 at 21:03

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.