It's called a "bot", short for web robot. It is a programme designed to push shares up or down by buying small parcels to make it look like the share is rising. The programmer must've bought lower, and is pushing it up to sell - or is pushing it up to short (not in AYN's case, don't think you can short them).
Or the bot will sell it down to buy, then buy it up, to sell (most of them), then bot sell it down again to buy, then .... etc. etc.
Doesn't affect the fundamentals of the company, which are the best for the Aussie silvers IMO.
AYN Price at posting:
8.2¢ Sentiment: Buy Disclosure: Held