RSI Calculator
Calculate Relative Strength Index to identify overbought and oversold conditions in trading
Calculate RSI
14-day period is the most commonly used timeframe for RSI
Closing Prices (Need at least 15 prices)
Enter closing prices in chronological order (oldest to newest)
Quick Fill Example
Try this example with Apple stock prices (October 2023):
Input Required
Please enter at least 15 closing prices to calculate RSI. You currently have 0 prices entered.
Example Calculation
14-Day RSI Example
Sample closing prices (15 days):
$189.50, $192.30, $190.25, $188.87, $191.45, $193.21, $189.95, $192.75
$190.42, $188.96, $191.33, $194.12, $192.88, $190.55, $193.67
Calculation Steps
1. Calculate daily price changes
2. Separate gains (+) and losses (-)
3. Average gains: Sum of gains ÷ 14
4. Average losses: Sum of losses ÷ 14
5. RS = Average Gain ÷ Average Loss
6. RSI = 100 - (100 ÷ (1 + RS))
RSI Levels Guide
Overbought Zone
RSI ≥ 70
Consider selling, price may decline
Neutral Zone
RSI = 50
Equilibrium level, trend transition
Oversold Zone
RSI ≤ 30
Consider buying, price may increase
RSI Trading Tips
Use with other indicators for confirmation
Look for divergences between RSI and price
14-period is standard, but adjust for timeframe
RSI can stay overbought/oversold in strong trends
Don't use RSI alone for trading decisions
Understanding RSI (Relative Strength Index)
What is RSI?
The Relative Strength Index (RSI) is a momentum oscillator that measures the speed and magnitude of recent price changes to evaluate overbought or oversold conditions in securities. Developed by J. Welles Wilder Jr. in 1978.
How RSI Works
- •Oscillates between 0 and 100
- •Compares average gains to average losses
- •Higher values indicate stronger upward momentum
- •Lower values indicate stronger downward momentum
RSI Trading Strategies
Overbought Strategy
When RSI > 70, consider selling or shorting as the asset may be due for a pullback.
Oversold Strategy
When RSI < 30, consider buying as the asset may be due for a bounce.
Divergence Strategy
Watch for divergences between RSI and price action - often signals trend reversals.
Important Considerations
- ⚠RSI can remain overbought or oversold for extended periods in strong trends
- ⚠Always use RSI in conjunction with other technical indicators
- ⚠Different timeframes may give conflicting RSI signals
- ⚠Market conditions and volatility can affect RSI effectiveness