# What is RSI in the Stock Market?

The Relative Strength Index (RSI) is a technical indicator used by investors in the stock market to measure the momentum of a stock. The RSI was developed by J. Welles Wilder Jr. in 1978 and has since become a popular tool for traders to identify potential buy and sell signals.

The RSI is a momentum oscillator that ranges from 0 to 100. The RSI is calculated by comparing the average gains and losses over a specific period, typically 14 days. The RSI is plotted on a chart, and investors can use it to identify overbought and oversold conditions.

How Does the RSI Work?

The RSI compares the average gains and losses over a specific period, typically 14 days. The RSI is calculated using the following formula:

RSI = 100 – (100 / (1 + RS))

Where RS is the average gain divided by the average loss over the specified period. The average gain and loss are calculated by summing the gains and losses over the specified period and dividing by the number of periods.

The RSI is plotted on a chart with a range of 0 to 100. When the RSI is above 70, it is considered overbought, indicating that the stock may be due for a correction. When the RSI is below 30, it is considered oversold, indicating that the stock may be undervalued and due for a rebound.

Traders can use the RSI to identify potential buy and sell signals. When the RSI is overbought, it may be a signal to sell, and when the RSI is oversold, it may be a signal to buy.

It is important to note that the RSI is not a standalone indicator and should be used in conjunction with other technical and fundamental analysis tools to make informed trading decisions.

How to Interpret the RSI?

The RSI is a valuable tool for traders to identify potential buy and sell signals. Here are some key points to keep in mind when interpreting the RSI:

1. Overbought Conditions: When the RSI is above 70, it is considered overbought, indicating that the stock may be due for a correction. When the RSI is in overbought territory, it may be a signal to sell.
2. Oversold Conditions: When the RSI is below 30, it is considered oversold, indicating that the stock may be undervalued and due for a rebound. When the RSI is in oversold territory, it may be a signal to buy.
3. Divergences: A divergence occurs when the stock price and the RSI are moving in opposite directions. This can be a signal that the trend is weakening and a reversal may be imminent.
4. Trend Strength: The RSI can also be used to determine the strength of a trend. When the RSI is above 50, it is considered bullish, indicating that the stock is in an uptrend. When the RSI is below 50, it is considered bearish, indicating that the stock is in a downtrend.
5. Support and Resistance: The RSI can also be used to identify support and resistance levels. When the RSI approaches a support level, it may be a signal to buy, and when the RSI approaches a resistance level, it may be a signal to sell.