3... very easy to spot increasing/decreasing/stalls when each bar has weight. jmho
Depends on your trade style tho. Im a scalper/mini run trader at this time. Although I catch some of the better swings in ER2 despite myself
Also, another aspect of my use of ATR is I don't use the "indicator" per se (not even visible to me)... just the calculated value Im interested in at the trade bar.