I have been reviewing a lot about RSI lately, and honestly, it is one of those indicators worth mastering if you want to trade stocks with more confidence.

Basically, the RSI (Relative Strength Index) shows you where the market momentum is. It compares bullish closes against bearish closes over a certain period, usually 14 candles. The great thing is that it normalizes everything on a scale from 0 to 100, so you don't have to interpret strange numbers.

The key thing here is understanding the extreme zones. When RSI rises above 70, the asset is technically overbought. Below 30, it is oversold. But here’s the interesting part: an asset can stay in those zones for quite some time if investors keep buying or selling. It’s not automatic that it bounces.

I saw a perfect example with Tesla a few years ago. Between 2019 and 2022, the indicator showed something fascinating. In May 2019, it was in oversold territory, but when it exited that zone, the price not only bounced but developed a strong bullish trend. The RSI reached overbought in February 2020, but here’s the important part: the price did not break the previous trend, so it was just a correction. That allowed you to keep buying, not selling.

The real magic comes with divergences. This is something many traders ignore but is very powerful. A bullish divergence occurs when the price makes lower lows in a downtrend, but the RSI makes higher lows. It’s like the indicator telling you: hey, selling pressure is running out, get ready for a rebound.

I saw this in Broadcom some time ago. While the price kept falling, the RSI was already showing that demand was gaining strength with those higher lows. A couple of months passed, and indeed, the bullish reversal came.

The opposite also works. A bearish divergence is when the price keeps making higher highs but the RSI makes lower highs. With Disney, exactly this happened. The price seemed to keep rising, but the indicator was already losing strength. Months later, the fall came.

Now, RSI is not infallible. Sometimes it generates false signals, especially on very short timeframes. That’s why many traders combine it with other indicators. MACD is a good partner. Together, they create a more robust system.

The strategy is like this: wait for RSI to reach oversold or overbought, then for it to return to the normal band, and look for MACD to confirm the move by crossing the histogram’s midline. Only then do you open the position. I saw this with Block Inc in 2021-2022, and it worked quite well.

Another useful thing is that middle level of RSI at 50. If the indicator oscillates between 50 and overbought, the price tends to go up. Between 50 and oversold, it tends to go down. With Meta, it was clearly seen: as long as RSI didn’t drop below that middle level, the uptrend remained strong. When it finally broke in 2022, everything changed.

What I learned is that RSI is just another tool in your arsenal, not the magic solution. It works best when combined with traditional trend analysis. Oscillators are leading indicators, so use them as a necessary condition, but wait for the actual break of the previous trend to act.

If you want to practice this risk-free, you can open a demo account on platforms that offer these indicators. Practice is what really teaches you to recognize patterns and avoid false signals. It’s very worthwhile to dedicate time to this.