meanwhile you likely could have sent a DM to anyone who mentioned the given ticker symbol and say "Re your latest tweet - so should I sell or buy?" and then you

meanwhile you likely could have sent a DM to anyone who mentioned the given ticker symbol and say "Re your latest tweet - so should I sell or buy?" and then you've simplified it to analyzing the response of anyone who responds for whether their response includes "sell" or "buy". if it's a random sampling you won't even need to tap the same people repeatedly. maybe follow-up DM's to the same person could be "how about now? MSFT, buy or sell?" and so forth. then it's not so blatantly obvious that it's a bot...