[jackb]

Well, there was some history made during this up move:

From Bespoke:
Last week's strength of group breadth was also notable given the fact that all 24 groups finished the day in positive territory on four different days. Looking back at data over the last ten years, we found that there has never been a period where all 24 groups were up on the day in four out of five trading days. In fact, prior to last week, there was never a period where all 24 groups were up on the day in even three out of five trading days.

[uexkuell]

Originally Posted by jackb »

Was yesterday's S&P 500 intraday session one of the tightest ever on a day that happened to also be well above its ATR? In looking at the ES, I don't see a pullback greater than 3 points.

My guess (of course can't show hard evidence for it):
Big boys got some new algos that keep pullbacks at a minimum.

You can see this across many timeframes and all major futures.
And the occurence of such patterns definitively increased in the last month or so.

It would make some sense:
Reducing pullbacks means also reducing the possibility for competitors to enter into a move with low risk.