The first back to back 3% declines since Nov of 2008 should really bring out the doom callers.
At this rate, 1000 pts a day, we be back at Nov 2008 levels sometime next month

The first back to back 3% declines since Nov of 2008 should really bring out the doom callers.

To start, lets recall the CONTEXT of yesterdays RTH session. Specifically, the opening and into the golden hour(s). Attached is my 5 minute ES chart of this time.
If you look at the bars, you can clearly see there was a lot of back and forth bar-to-bar, with the volatility range (price range) of preceding bars being retraced... IOW, pairs of bars were quite similar in volatility without a lot of gain and perhaps a lot of pain (depending on your trade risk appetite.)
Two points in conclusion...
1) there was more bar range volatility than sustained directional volatility during the time in focus. Hence my mention of chop. Directional moves were tame and lame given the bar ranges and sustained (but declining) level of volume.
Where is @Rickshaw Man ?
Simply put - if I understand you correctly - there was a lack of direction on the 5-minute chart?
I don't quite know how you calculate that Excel sheet
We did make history today for sure:
Today's RTH range at 130.00 points is officially the largest RTH range in ES history.
These are absolute or nominal points. Simply the high/low difference.
In terms of points offered, 1230.25 (nearly 10 times the actual range), that makes this day the 6th largest since 2006.
So, absolutely not your normal market day.
In terms of simple daily change (-3,04 %) - today is not that special though.
No. And in that part of the answer I will say volatility could be defined on ANY time based chart. 5 minutes is merely a variable.
There are 2 types of volatility. There is the kind measured by tools such as VIX, and there is bar volatility. Bar volatility has 2 components. One is the speed or pace of the volume as the bar is forming. Two is the price volatility (range) of the bar itself, which is also tied to volume.
Only thing you don't mention in that post is it occurred on volume of 4.25 million, which is possibly another record of some sort!