CU6 - ASX Charts, page-271

I’m no expert but can have a go at helping out.

In regards to the bot trading (algorithmic trading), obviously these systems are used to either gain a large position or distribute a large position without moving the SP too far therefore they may be in action for days/ weeks to achieve that goal. They are cleverly disguised as to not give out any clues as to their intention. The only way to get an idea is to follow the tape over many hours to identify the bots patterns. ( but who wants to do that? )

But what you also have are MM’s ( market makers) that add liquidity for buyers/ sellers. Below is a link to read up on rather than me try and explain it.
https://www.investopedia.com/terms/m/marketmaker.asp

So the PA has a lot going on, insto’s involved in this have very large and complex trading desks and yes TA is a very important tool to them but it is used in a different way to trading groups or individuals.
Ive always liked this below clip as an example of an active desk.

There are many very good YouTube vids on this topic or seminars you can attend that go into the fine details but I’ve got to say it’s as boring as batshite unless you’re very passionate about it.

Cheers.