Including channel resistance in charts can be a bit of a mixed blessing. On one hand, it gives an indication as to when sellers can be expected to make an appearance in a rally. On the other, it can force you out of a position right before a rally accelerates.The S&P 500 is underperforming relative to the Russell 2000 (IWM), and yesterday's doji made a picture-perfect tag of channel resistance that delivered with selling today. If one were to look where buyers might come back, the 20-day MA is looking like a good place to start; a bounce here would put a squeeze on a channel resistance breakout and an acceleration of the current rally. investing.com