I trade the ER2. My method is tape reading. I look at the intermarket relationships and trade whatever the market tell me.
I look at the following:
RUT, COMP, SOX, BKX
ER2, NQ, ES, YM AND KLAC (my indicator stock)
I use 20 and 34 ema on 2 and 5min chart.
I've been trading 3 years...