As of Dec. 24, 2025, two stocks in the communication services sector could be flashing a real warning to investors who value momentum as a key criteria in their trading decisions.The RSI is a momentum indicator, which compares a stock’s strength on days when prices go up to its strength on days when prices go down. When compared to a stock’s price action, it can give traders a better sense of how a stock may perform in the short term. An asset is typically considered overbought when the RSI is above 70, acc ...