What it means
An oscillator is an indicator that moves between upper and lower boundaries. RSI is a common example because it moves between 0 and 100.
Why it matters in live markets
Oscillators help organise information about momentum, stretched conditions, or changes in price behaviour. They can be useful for context, but they should not be treated as automatic trading signals.
Key points
- An oscillator moves within a defined range.
- RSI is a widely used oscillator.
- Oscillators are often used to observe momentum.
- High or low readings can be misunderstood without context.
- Oscillators do not remove market uncertainty.
Example
RSI is an oscillator because it moves between 0 and 100 and is often used to observe recent momentum conditions.
Related glossary terms
Relative Strength Index, Momentum, Overbought, Oversold, Divergence
Where you will see it
You will usually see oscillators discussed in technical analysis guides, indicator education, RSI tutorials, and chart-analysis articles.