Start building free

Node reference

RSI — Relative Strength Index

Momentum oscillator (0–100) measuring the speed of recent gains vs. losses.

Rev. 2026.06

RSIindicator
InputsOutputs
Source
source · number
RSI
RSI
main · number
Configure
period
— Lookback length, in bars
default 14
range 1–500
RSI80.5latest
rsi
0.050.01007030
Period14
2 · fastsmooth · 30

Mid period (14) — a balance of sensitivity and steadiness.

What it does

Measures momentum on a 0–100 scale. Above 70 is conventionally overbought; below 30 oversold.

What happens

Recomputed each candle from its wired source (default close), incrementally. It has no value until period bars have passed (warmup); after that it emits the RSI for every bar.

When to use

Mean-reversion entries (buy oversold / sell overbought) or as a momentum filter on a trend strategy.

Gotchas

  • Overbought ≠ sell signal in a strong trend — RSI can stay >70 for a long time.
  • Shorter periods are noisier; 14 is the classic default.