Any idea?
Very tough to learn, happens in seconds and gone, matter of watching and not reading material. Years of watching you might come up with a few maybe repeatable patterns. But it more of watching when trend lines or fibs are near, what is order flow doing then, more or less volume coming on, is bigger volume coming in to trip the stops or is it a justified move to break through an area. You develop as you go to find answers to your questions as you go. Much harder in futures as you don't know if 10 traders buying 10 lots each or one trader doing 100 lots cause of offsetting in Globex. I prefer watching the Dome more around those areas and watching either more volume coming in or out and especially on "traps" of retail, traps often occur near end of a trend, retail might be trying to get into last wave of one direction(cause they couldn't pull the trigger to enter early so they prefer to get in late) and larger traders kept market from going retail direction. You need to watch long hours and keep good private journal.
I think the main concept is that with order flow you can 'see' four different scenario's
More buyers then sellers --> obvious and price goes up
More sellers then buyers --> obvious and price goes down
Lack of buyers --> looks like there are buyers in charges but price is not really moving according to the buying, so in fact sellers are just hitting the bid with their inventory. You start see a divergency between price and delta.
Lack of sellers --> same thing like above, only buyers are in charge and price is not really moving down, buyers are in control but hitting the ask to accumalate inventory.
You see this action a lot at support and resistance. You can 'feel' after a while if support or resistance will hold or not just by looking at the action between price and orders. I do not think there is more to it.
Example of divergency in chart