I traded ES for over a decade and in 2017 i gave it away due to the pathetic range and i think much of that is due to algo's , sure you can make a profit still and it is slightly better in 2018 BUT something like the NQ gives me the volatility i crave . Daily ATR ES is around 0.6% recently with NQ > 1.2% . Anyway its a fact in recent years ES range has been dramatically suppressed .
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Anyway the point i am making is that the available range to exploit is becoming smaller in a standardised sense in many instruments and i think algos have a big part in that . There are methods to find instruments with better ranges to exploit , naturally your tolerance/desire for heightened volatility can temper the need to find the movers