Free tool

RSI calculator

The Relative Strength Index (Wilder's method) from your own closing prices, with what the number means.

Closing prices, oldest first (spaces, commas or new lines)Periods

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Questions

What does RSI tell me?

How strongly prices rose versus fell recently, from 0 to 100. Above 70 is often called overbought, below 30 oversold - a reason to look closer, not a signal on its own.

Which method is used?

Wilder's smoothing over 14 periods, the standard used by most charting platforms.

Free to use, nothing is stored. Educational information only - not financial or tax advice.