There have been an (embarrassingly) large number of occasions when I've opened my cloud computer, fired up TWS, fired up TAT, and ...
... at 9:35 or thereabouts, wondered why no trades had yet been taken?
Errr ... I've FORGOTTEN to 'Connect to TWS' on a number of occasions (yep, silly me).
If it was FLASHING RED (when not connected) it would help senile old folks like me remember push the button ...