Definition of RSI (Relative Strength Index)
A momentum oscillator ranging from 0 to 100 that measures the speed and magnitude of recent price changes. RSI above 70 suggests overbought conditions; below 30 suggests oversold.
At a glance
Term
RSI (Relative Strength Index)
URL slug
rsi-relative-strength-index
Category
Analysis
Short answer
A momentum oscillator ranging from 0 to 100 that measures the speed and magnitude of recent price changes.
Deep dives
Full A–Z glossary
Example
Apply the definition: restate “RSI (Relative Strength Index)” in one sentence tied to your next trade (symbol, direction, size, stop). If you cannot, re-read the definition above.
Common mistake
Common mistake: using “RSI (Relative Strength Index)” as loose slang while your broker/platform specification defines it more narrowly.
Professional tip
Tip: bookmark this “RSI (Relative Strength Index)” page and reopen it when reading broker specs so definitions stay consistent.
Practice tools:
Related terms
FAQ
A momentum oscillator ranging from 0 to 100 that measures the speed and magnitude of recent price changes.
Knowing the precise definition of “RSI (Relative Strength Index)” prevents platform and broker-spec mistakes—a common source of size and cost errors.
Common mistake: using “RSI (Relative Strength Index)” as loose slang while your broker/platform specification defines it more narrowly.