What is the RSI Indicator?
RSI stands for Relative Strength Index. It is a popular technical analysis indicator that measures the speed and magnitude of a stock's recent price changes. RSI helps traders identify whether a stock is overbought (potentially due for a pullback) or oversold (potentially due for a recovery). It is shown as a line that oscillates between 0 and 100.
How RSI is Calculated
RSI is calculated over a default period of 14 days. It compares the average gains on days when the stock went up to the average losses on days when it went down. The formula converts this ratio into a 0 to 100 scale. You do not need to calculate it manually as trading platforms compute it automatically.
How to Interpret RSI Values
- RSI above 70: The stock is considered overbought. This suggests the stock may have risen too fast and could pull back.
- RSI below 30: The stock is considered oversold. This suggests the stock may have fallen too much and could recover.
- RSI around 50: Neutral zone; neither overbought nor oversold.
RSI in Trending Markets
In a strong uptrend, RSI can stay above 70 for extended periods without the stock falling significantly. In a strong downtrend, RSI can stay below 30 for long periods. This is why RSI works best in ranging markets and should be used cautiously in strongly trending markets.
RSI Divergence
One of the most powerful uses of RSI is divergence analysis:
- Bullish divergence: Stock makes a new low but RSI makes a higher low; suggests weakening downtrend and potential reversal upward
- Bearish divergence: Stock makes a new high but RSI makes a lower high; suggests weakening uptrend and potential reversal downward
Using RSI with Other Indicators
RSI is most powerful when used alongside other tools. Combine RSI with support and resistance levels, moving averages, and candlestick patterns for higher probability trades. An oversold RSI signal at a key support level with a bullish candlestick pattern is a much stronger buy signal than RSI alone.
Key Takeaway
The RSI indicator helps identify overbought and oversold conditions in a stock. It is one of the most widely used technical indicators in Indian markets. Use it as part of a broader analysis framework, not in isolation. Explore RSI and other indicators on the Lemonn app's charting tools to enhance your trading decisions.
