rsi
Relative Strength Index
rsi(source, periods, matype="wilder")
Parameters
| Name | Type | Description |
|---|---|---|
source |
field | Data series (commonly close) |
periods |
int | Number of periods (commonly 14) |
matype |
str, optional | Smoothing type ["wilder", "sma", "ema"], default "wilder" |
Formula
```
RSI = 100 - (100 / (1 + RS))
RS = Avg Gain / Avg Loss
Avg Gain = MA(gain(source), periods)
Avg Loss = MA(loss(source), periods)
```Examples
// overbought condition (RSI above 70)
rsi(close, 14) > 70;
// oversold condition (RSI below 30)
rsi(close, 14) < 30;
// RSI exiting overbought zone
crossunder(rsi(close, 14), 70);
// RSI with EMA smoothing instead of Wilder
rsi(close, 14, matype="ema") > 50;Returns
Float 0-100 (>70 overbought, <30 oversold)