Quote from Euler:
Shreddog,
You might be interested in knowing that you CAN in fact modify orders through the Sterling API. The command is ReplaceOrder, and it's in the latest docs dated Dec 26, 2007.
Actually that function has been around for a while. But I was told by Sterling support that it does not work for ECN's and I verified this. Perhaps it works now, but I haven't tried it in quite some time.