I just realized that many new traders still do not fully understand what RSI is and how to use it correctly. This indicator is truly powerful, but if used incorrectly, it can lead to significant losses.

RSI (Relative Strength Index) was developed by Welles Wilder in 1978. It is an oscillator used to measure momentum—that is, the rate of change of price over time. This indicator ranges from 0 to 100, with three main zones: oversold (0-30), neutral (30-70), and overbought (70-100).

But here’s the trap that most traders fall into: when they see RSI surpass 70 (overbought), they rush to sell; when it drops below 30 (oversold), they rush to buy. Big mistake! Prices can continue trending strongly, and RSI can reach 90 or drop to 10 during strong trending phases. If you place orders at those times, your stop loss will have to be very wide, resulting in poor risk/reward ratios.

I learned a secret from professional traders: never use RSI alone. Always combine it with other tools to confirm signals. For example, when RSI reaches the overbought zone, wait to see if any candlestick patterns confirm a reversal (like Bearish Engulfing). Only then do you enter a trade with a tight stop loss.

There’s one detail many people overlook: the middle line at 50. When RSI is above 50, momentum is increasing—look for buying opportunities. When below 50, momentum is decreasing—look for selling opportunities. Simple but effective.

Regarding divergence—this is the strongest signal from RSI. When the price makes a lower low, but RSI makes a higher low, or vice versa—that’s a sign a reversal may be coming. But you need additional confirmation from candles or other patterns before entering.

The default setting for RSI is 14 periods, but you can adjust it based on your style. Short-term traders often use 9 for more sensitivity to small movements. Swing or long-term traders use 25 to filter out noise and focus on the main trend. I recommend trying different settings to find what works best for you.

The key point is: what is RSI? It’s a supporting tool, not a decision-maker. Always combine it with support/resistance, trendlines, Fibonacci, or candlestick patterns. When all these factors confirm the same signal, that’s when you should act.

Remember, successful trading isn’t about finding perfect signals, but about good risk management. Enter trades with multiple confirmations, set tight stop losses, and let profits run. That’s how professional traders do it.