Charter’s moving averages
Relative strength index
As of January 9, Charter’s 14-day RSI (relative strength index) score was 47. AT&T’s and Verizon’s 4-day RSI scores were both 52, and Sprint’s was 59. RSI scores are measured on a scale of zero to 100, with scores above 70 suggesting a stock is overbought, and under 30 suggesting it is oversold.