CLI
price must be a positive decimal string. The order ID must be 1 to 128 characters.
HTTP
price.
Response
Success returns HTTP202 with the standard envelope. data contains order_id and accepted. accepted: true acknowledges the modification request; it does not mean the order reached its final state. Query Get order afterward.
Possible action errors include order_not_found, order_not_modifiable, and broker rejection.
