The more sensitive of the two. It catches extremes inside extremes.
The short answer
- What is the Stochastic RSI (Stochastic RSI)?
- Stochastic RSI: the Stochastic applied to RSI, not to price.
- When is Stochastic RSI wrong?
- It hits both extremes often. A signal without context is worth nothing. Its current reading on the platform's symbols, at the latest daily close, is in the "Current reading" table on this page. See its current reading →
Reading now
| Ticker | Value | Five sessions ago | Status |
|---|---|---|---|
| SPY | 80.38 | 100.00 | In the upper zone (above 80) |
| QQQ | 0.00 | 100.00 | In the lower zone (below 20) |
| IWM | 36.98 | 75.46 | Between 20 and 80 |
| DIA | 85.08 | 100.00 | In the upper zone (above 80) |
A description of where the number sits against its thresholds. It is not an entry or exit signal.
Indicator limit
It hits both extremes often. A signal without context is worth nothing.
Read it with
Bollinger Bands: its extremes deserve attention when price touches the Bollinger band at the same time.
Answers: Has the move stretched?
What it actually does
The Stochastic RSI applies the oscillator formula to the RSI readings themselves, not to price: where today's reading sits between the lowest and highest reading in the window. It is a derivative of a derivative, so it is far more sensitive than either one.
Why it exists
Because the RSI can sit between 40 and 60 for months without touching a threshold, its signals vanish in quiet markets. This indicator rescales its readings to their recent range, so it produces signals even when the underlying does not reach an extreme. The price of that is noise.
How it is read in practice
Its thresholds are 0.8 and 0.2 (or 80 and 20). Because it is very jumpy, a careful reading waits for the exit from the extreme zone, not the entry into it: a cross back above 0.2 after time spent below is more reliable than simply reaching it.
Hypothetical example
A quiet stock whose RSI swings between 45 and 58 for a full month · without a single signal. The oscillator derived from it gives 6 full cycles between its extremes over the same period: 4 are useful within the range, and 2 are false during two breakout attempts.
Where it errs and why
The noisiest oscillator of them all. Being a derivative of a derivative, it doubles the sensitivity and, with it, the false signals. It is not suited to entries on its own in any timeframe.
Read it with
Read it with its underlying (the raw RSI) so a relative extreme is not mistaken for a real one, with trend strength as a gate, and with volume as confirmation.
Where to see it on the platform
The technical chart can show it as an option below price, next to its underlying, so you can compare the two readings in one view.
