It's easy to miss a trade opportunity via poe.trade in Path of Exile because you step away from the computer for a few moments. In order to complete a trade successfully, you often need to reply to the sender within a minute or so or they will move onto another seller.
This code monitors the Path of Exile log file for new user messages requesting a trade via poe.trade, or notification of a disconnect from the server. When one of these messages are detected, send a message Discord or Slack.
*** NOTE *** This has not been tested with Slack + Path of Exile since I wrote it around February 2017, so your success may vary.