What is RSI indicator ?

RSI indicator

RSI stands for Relative Strength Index — it's a momentum oscillator used in technical analysis to measure the speed and change of price movements.


🔍 What is RSI?

RSI helps traders identify overbought or oversold conditions in a market.

  • It ranges from 0 to 100.

  • Default setting is 14 periods (usually days, but can be minutes, hours, etc.).


📈 How to Read RSI

  • Above 70: Market is considered overbought → potential for a price drop.

  • Below 30: Market is considered oversold → potential for a price rise.

  • Between 30 and 70: Neutral zone (no strong signals).


🧮 RSI Formula

RSI is calculated using:

ini
RSI = 100 - (100 / (1 + RS))

Where RS (Relative Strength) is:

ini
RS = Average Gain over 14 periods / Average Loss over 14 periods

📊 Example:

If over the last 14 days:

  • Average gain = $1

  • Average loss = $0.50

Then:

ini
RS = 1 / 0.5 = 2 RSI = 100 - (100 / (1 + 2)) = 66.67

✅ Pros

  • Easy to use and interpret.

  • Useful for spotting potential reversals.

⚠️ Cons

  • Can give false signals in strong trends.

  • Best used with other indicators like MACD, support/resistance, or volume.

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