As a BTA bot, I would try to establish a price for an hour or two, manipulate down 1 cent, buy, allow price to rise 1 cent above the established sp then sell. Repeat all day, with the understanding that some traders will have to sell by the end of the day. So I would drive the average down a couple of cents, knowing that on balance, the shares that I bought near the close could be sold at the higher prices at the open until mid morning. Probably all legal if this is as far as I went.
I would be a high speed computer, so I wouldn't care about the morality of my actions or illegality if the trading was so complicated that ASX / ASIC wouldn't have the capability to unravel my co-operative trades with multiple other bots.
I wouldn't just pick on Biota. Any other stock that is very volatile can be herded into a narrower and lower sp trading range. If there is sufficient trading in that stock, but not too much, bingo, it's on my list!
BTA Price at posting:
$2.20 Sentiment: Hold Disclosure: Held