If I am trading the futures I do not bother looking at the index or ETF. Mainly because I am probably trading London session where futures are very active and there is near no volume in the other two. Regardless I think staring at the same chart listed in 3 different formats is overkill for my style as well. If I have another chart open it is probably NQ, GC, CL, or DXY as a way to see possible confluences with what assumptions I have of the current market structure. The minute differences between the future, index and ETF tickers are so small, you're not doing yourself any favors by trying to decipher one to understand the other. Since futures are open 23/6, best to find a chart for RTY alone, will be less susceptible to gaps in pricing that can create issues in your indicators