the bot is allowed to jump the queue. in the old days, there might have been 4 or 5 buyers at a particular price - and if a seller came down to that level - then the trade was split - but with electronic trading, the first person in the queue, had his order filled first - which seemed fair.. with bot trading, the bot, can jump the queue, by nanoseconds . it is a bit like betting on the horse race - after the race has finished
