Am I imagining things or were the price action cleaner in the past with more follow through and less retraces/backfill? Or have the ES always been that way?
Even if the market drops - you typically have to sit through 10-15 point fast retraces.
It seems that many have always "complained" that the ES trades with a lot of back and fill, especially during the RTH session. I think this is why many are, or at least were attracted to the NQ when starting out as it tended to have "better," i.e. more tradable swings between retracements than the ES.
But I have noticed no change other than an increase in range. The retracement percentages are the same as they were pre-crash. I can print out an ES chart I took last year or the year before and compare it to yesterday's and if you take away the price scale you'd see no difference.
What hasn't changed is the occurrence of the more easily traded trending movements taking place between the London/Frankfurt opens and USA 9:30 AM NYC open while the market then consolidates those moves during the sometimes interminable RTH session.
So yes, the retracements are deeper, but only in raw points. In terms of price action I do not feel anything has changed. Bigger stops required to trade the bigger targets offered.

