compared to the previous bars.
That is where you are going wrong. Context. Why compare to previous bars? Is this even logical?
I've tried researching it, but I couldn't find anything that described how they go about their business & how it affects the charts we watch.
Well as understanding this is the key to the whole market, did you really expect to find it written down somewhere for you to 'research'?
Sure, there are answers. Gotta put in the work to find them for yourselves. Those who know already are gonna stay stum. If you don't know how these traders do business and how it affects the charts you watch (and therefore the decisions of many other traders), then what are you basing your trading decisions on? Or are you just looking at a chart and seeing a bare record of transactions without any appreciation for the motives behind the decisions and therefore what decisions traders will want or need to make in future?
It is good to ask questions - when you understand the decisions which created the volume at the highs on Thursday - then you will understand
what was likely to occur in the first part of Friday's trading session. A meal for a lifetime if you can work it out.
Would be nice to have a proper discussion about the questions you ask, but ET isn't the place unfortunately.
you can only know in hindsight if that was going to be an intra-day extreme where the market would retrace
All I ever read on trading boards is "you can't". Written by people who can't. Imposing their limited view on everyone else. What you really mean to say is
"I can't". Just because you cannot see the order, doesn't mean there isn't any order to be found.
I can't tell you why the volume spikes occurred at all, but demand is what caused price to rise.
And when the market falls the following day, you'll be back to tell us that "supply" is what caused price to fall? You write a lot, yet say nothing of value. Impresses those who need to be impressed though. It is sad to see so many starting "price action" journals and following you apparently without even having asked the obvious question: do you truly have something of value to offer?
You say both buyer and seller for every unit of volume reported, yet talk only about "demand" causing price to rise. What about supply while the market was rising Thursday? Who was selling there and what is their motive? Closing existing positions (for profit? under duress?) or opening new positions? Was the price being driven higher by strong demand, or being allowed to rise to bring in more weak demand, to satisfy the needs of the strong sellers? What timelines of trader are we talking about? Day traders only? Swing / position traders?
Do we know (or can we measure) how much of the volume is directional, how much is hedging/arbing? All interesting and relevant questions.
Like any other subject, trading should be made as simple as possible, but no simpler. Those who are seriously interested in learning need to do their own work to find the answers, which is best done away from the drivel and distractions common on trading forums.