According to IB's release notes, there's a new feature in API v8.0 that offers overfill protection. However, the release notes states: I'm no programmer, but it makes no mention of any changes to DDE syntax (for my Excel spreadsheet). Does anyone know what's the specific syntax change for the twsdde.xls spreadsheet, if any? Looking through the VBA, it doesn't look like there's any syntax change, since I couldn't seem to find any "quantity" tag that gets sent along with the quantity value. Any help would be much appreciated!