Relative Strength Index (RSI) Calculator

Analyze Market Momentum with RSI

The RSI calculator helps you determine the momentum of a financial instrument by calculating the Relative Strength Index. Enter your price data and period to get instant RSI values and trading signals.

RSI Calculator Examples

Explore practical RSI calculations for different markets.

Stock RSI (14-day)

Stock

Calculate the 14-day RSI for a stock using daily closing prices.

Prices: 44.34, 44.09, 44.15, 43.61, 44.33, 44.83, 45.10, 45.42, 45.84, 46.08, 45.89, 46.03, 45.61, 46.28, 46.28, 46.00, 46.03, 46.41, 46.22, 45.64, 46.21

Period: 14

Crypto RSI (10-period)

Crypto

Calculate the 10-period RSI for a cryptocurrency using hourly closing prices.

Prices: 101.2, 102.5, 100.8, 99.7, 98.6, 99.1, 100.3, 101.7, 102.2, 103.5, 104.1, 103.8, 104.5

Period: 10

Short Sequence RSI (5-period)

Short Sequence

Calculate the RSI for a short price sequence.

Prices: 10, 11, 12, 13, 14, 15, 16

Period: 5

Volatile Market RSI (7-period)

Volatile Market

Analyze RSI in a volatile market scenario.

Prices: 200, 195, 210, 220, 215, 225, 230, 220, 210, 205, 215, 225, 235, 240, 245

Period: 7

Other Titles
Understanding the Relative Strength Index (RSI): A Comprehensive Guide
Master the RSI for smarter trading decisions.

What is the Relative Strength Index (RSI)?

  • Definition and Purpose
  • Historical Background
  • Why RSI Matters
The Relative Strength Index (RSI) is a momentum oscillator developed by J. Welles Wilder Jr. in 1978. It measures the speed and change of price movements, helping traders identify overbought and oversold conditions in financial markets.
RSI as a Technical Indicator

RSI in Action

  • A stock with an RSI above 70 may be considered overbought.
  • An RSI below 30 can signal an oversold asset.

Step-by-Step Guide to Using the RSI Calculator

  • Inputting Price Data
  • Choosing the Right Period
  • Interpreting Results
To use the RSI calculator, enter a sequence of closing prices and select your desired period. The calculator will process your data and display the latest RSI value along with the full RSI series.
How to Read RSI Values

Practical Tips

  • If your price sequence is too short, the calculator will prompt you to add more data.
  • A period of 14 is standard, but you can experiment with different values.

Real-World Applications of RSI

  • Stock Market Analysis
  • Cryptocurrency Trading
  • Forex Strategies
RSI is widely used in various financial markets to identify potential buy and sell signals. It helps traders spot momentum shifts and optimize entry and exit points.
RSI Across Markets

Market Use Cases

  • Traders use RSI to confirm trends in stocks and cryptocurrencies.
  • Forex traders rely on RSI for timing their trades.

Common Misconceptions and Correct Methods

  • RSI is Not a Standalone Signal
  • Avoiding False Positives
  • Combining RSI with Other Indicators
While RSI is powerful, it should not be used in isolation. Combining RSI with other technical indicators can improve accuracy and reduce false signals.
Best Practices for RSI

Tips for Accurate Analysis

  • Use RSI with moving averages for better results.
  • Watch for divergence between price and RSI.

Mathematical Derivation and Examples

  • RSI Formula Explained
  • Step-by-Step Calculation
  • Sample Calculation
RSI is calculated using the formula: RSI = 100 - (100 / (1 + RS)), where RS is the average gain divided by the average loss over the selected period. The calculation involves smoothing techniques for accuracy.
Worked Example

Calculation Example

  • Given prices: 44.34, 44.09, 44.15, ... (period 14), the RSI is calculated step by step.
  • The result helps identify if the asset is overbought or oversold.