These questions stem from the topic about 'Dark Pools'
As a trader/investor I would much rather know the following:
8. Were can I buy one of these 'bot' applications already configured (preferably with a GUI)?
I think your best bet with this would be to post a request on the "marketplace" board
. Most (all?) exchanges make available an "API" so having a bot interact with an exchange is pretty easy. The hard part will be the rest of the bot - the part that decides when and whether to trade, and how much. I don't know if anything like that exists at present, or, if it does, the owner(s) would be willing to (1) admit to it, and (2) sell their bot.