Starting 08:00 UTC on 24 June 2020, amending an order will require a
leavesQty to be changed. After this time, amend order requests that do not satisfy this condition will be rejected. Bulk amend requests will be rejected if any of the amend orders in the bulk are rejected. Reject message: “
Invalid amend: orderQty, leavesQty, price, stopPx unchanged“. This change has been live in the Testnet environment for a month.
This functionality update is part of the ongoing simplification of our API and trading system architecture. If you have any further questions, please contact Support.