A couple of questions to those on this forum who are using a TWS DDE Excel automated trading system: 1) Do these recent (december) API/Excel changes mean that my system (based on the previous TwsDde.xls sheet) will stop working any time soon? 2) If my system is working fine as it is, can I go ahead and just ignore these new features and changes, so I won't have to spend a week adapting my system to new settings (or even rewrite some vba code)?