RSI Indicator: How Relative Strength Index Works in TradingView
The Relative Strength Index (RSI) is a momentum oscillator developed by J. Welles Wilder Jr. in 1978 that measures the speed and magnitude of recent price changes on a scale from 0 to 100. It calculates average gains divided by average losses over a set period — usually 14 bars — and tells you whether buying or selling pressure has been dominant.
Here's the thing though. Most traders I've watched treat RSI like a magic 8-ball. They see a reading below 30 and immediately buy. I've seen people blow through their accounts this way. RSI doesn't predict the future. It measures momentum. When it climbs above 70, the asset has been moving up fast. When it dips below 30, selling has been intense. That's useful data, but you can't act on it blindly.
What makes RSI genuinely practical is its simplicity. It oscillates between 0 and 100, giving clear visual cues about momentum conditions. But — and this is what most people miss — those overbought and oversold levels aren't automatic buy and sell signals. They're warnings that the current move might be getting exhausted.


