Well, you may be right, but it doesn't look like bot activity today to me (I'm happy to be corrected!). SXY day chart aligns quite well with the All Ords, except that it goes down a bit more. There's only one extended session of small trades (which I take to be a bot signature) and that didn't seem to be heading anywhere in particular. Maybe bots were just dipping their toes in the water (I'm told bots do that too, but it's hard to know what can be believed).
SXY Price at posting:
20.5¢ Sentiment: Buy Disclosure: Held