Have you ever stopped to think about how traders actually use the RSI in their daily trading? Many people think it's just about looking at 70 and 30 and making trades, but the reality is much more nuanced.

Created back in 1978 by J. Welles Wilder, the RSI indicator has become virtually mandatory in any analyst's toolkit. The logic is simple: it measures the speed and magnitude of price changes, oscillating between 0 and 100. When it rises above 70, the asset is theoretically overbought. Below 30, it’s theoretically oversold. But here’s the point: theoretically.

Its calculation uses a straightforward formula. Basically, you calculate the ratio between average gains and average losses over a period (usually 14 days), and that becomes your RS. Then, the RSI index = 100 - 100 / (1 + RS). Nothing complicated, but the devil is in the details of interpretation.

The big problem is that many traders fall into the trap of thinking that an RSI above 70 is a signal for automatic selling. It’s not. In markets with strong trends, the indicator can stay in the overbought zone for weeks, and the asset continues to rise. I’ve seen this happen countless times with altcoins during a bull run. It’s frustrating, but it’s the reality.

Now, where RSI becomes more interesting is in divergences. When the price hits a lower low but the RSI shows a higher low, you have a bullish divergence — this can indicate that the downtrend is losing strength. The opposite also applies: a higher high in price with a lower high in RSI suggests fatigue in the uptrend. These situations tend to be more reliable than simply looking at 70 or 30.

Many traders adjust the RSI period depending on the asset. In high volatility, some use 9 days instead of 14 for quicker signals. Others combine it with stochastic analysis or Bollinger Bands for more confirmations. The key is not to rely solely on the RSI indicator.

The limits are real: late signals in explosive trending markets, many false positives, and the constant need for validation with other tools. Using RSI in isolation is a recipe for frustration.

My view? The RSI indicator works best as part of a system, not as the absolute truth. Combine it with support/resistance levels, volume, and proper risk management. That’s when you have a solid approach.