I have been working with technical analysis for years, and if there’s one thing that changed my way of trading, it was truly understanding how the RSI works beyond just looking at whether it’s above or below 70 and 30. Most novice traders see the indicator in overbought conditions and automatically sell, but that’s only half the story.

The Relative Strength Index measures momentum by comparing bullish closes against bearish closes over a certain period, usually 14 candles. What most don’t realize is that this indicator smooths out extreme price fluctuations, which significantly reduces noise. It provides a fixed range between 0 and 100, and that’s incredibly useful for understanding where we are really positioned.

Now, what really changes the game is RSI divergence. This is where many lose money without understanding why. When the price makes higher highs but the RSI makes lower highs, you’re seeing a bearish divergence. It’s as if the market is shouting that the strength is waning. The opposite also works: if the price drops to lower lows but the RSI rises to higher lows, you have a bullish divergence that anticipates a rebound.

I looked at Disney’s case a few years ago. The price was steadily rising, everything seemed fine, but the RSI was making lower highs. That was a clear bearish divergence. And indeed, months later, the collapse came. It’s not magic; the indicator captures the loss of momentum before the price does.

Something interesting happened with Tesla in 2020 and 2021. It entered overbought multiple times, but as long as the RSI didn’t drop below the mid-zone, it was just corrections within an uptrend. This is key: the 50 level on the RSI is invisible but powerful. If the indicator oscillates between 50 and overbought, the price tends to go up. If it oscillates between 50 and oversold, it goes down. As long as it doesn’t cross that mid-level, the trend remains.

RSI divergence trading works best when combined with breaking previous trendlines. It’s not just about spotting divergence but confirming it with price action. With Broadcom, I saw a perfect bullish divergence: the price made lower lows in a downtrend, but the RSI made higher lows. That indicated buyers were gaining strength. Indeed, weeks later, the rebound happened.

Some traders complement RSI with MACD to get more robust signals. The idea is to wait for RSI to leave extreme zones, then confirm with MACD crossing the midline in the opposite direction of the previous trend. I saw this with Block Inc.: overbought RSI, then MACD crossing below the midline, and that’s when I opened a short position. The system worked for months.

The important thing to remember is that RSI is an oscillator; it generates early signals. It’s a necessary condition but not sufficient. You need to validate with trend analysis, breaking previous lines, and price structure. Many times, the indicator gives false signals if used on very small timeframes.

RSI divergence is probably the most powerful tool I have in my arsenal. It’s not infallible, but when you see the price and indicator diverge, you know something is changing. The market is losing or gaining strength, and that’s valuable information to position yourself before the main move occurs.