RSI (Relative Strength Index)

RSI is a momentum indicator that measures how fast a stock's price has been rising or falling on a scale of 0 to 100. It's one of the most popular tools in technical analysis—the practice of studying price charts to predict future moves. You'll see RSI mentioned constantly in trading forums and charting platforms because it helps traders spot when a stock might be overbought (rising too fast, possibly due for a pullback) or oversold (falling too fast, possibly due for a bounce). For example, if TechCorp stock has an RSI of 75, that's considered high and might suggest the price has climbed aggressively. RSI isn't a crystal ball, but it's a useful signal to watch alongside other information.