Here are some posts on the subject:Quote from 1.6180340:
Romanus,
What is the definition of "Pace Acceleration" ...
I am afraid I can't help you here - 'why' is a one of those existential questions that humanity is still struggling with.Quote from 1.6180340:
... and why is that present at 15:50?

Quote from guavaman:
One has to know where the previous day ended in regards to the sequence.
If I'm parsing Spyder's response http://www.elitetrader.com/vb/showthread.php?s=&postid=2187754#post2187754 to my question, which is similar to what you are asking, Romanus, I think the answer is that there has to be a context which will allow the market to do what it said it was going to do.Quote from romanus:
Let's say, for example, the market ended today between p2 and p3 in the sequence. So tomorrow, either:
(a) it will definitely pick up where it has left in the sequence today - it will complete the down traverse and provide signal for change,
or,
(b) during the 'sync' we will have to determine if the market will finish what began today, or if the market is building something new.
So basically, it will or it won't and the 'sync' is suppose to provide the clues? Or, it definitely will finish and only then begin building something new?
That's the part that is not clear to me. A 'Pre-Flight' Check represents nothing more than Monitoring - except in this case - it occurs prior to the opening bar. In other words, the trader contantly does a 'Pre-Flight' Check for bars which in the now sit somewhere in the near future. Nothing is different - except for the time of day in which one performs the action.Quote from ljyoung:
... I think the answer is that there has to be a context which will allow the market to do what it said it was going to do.
lj