Range Efficiency (ER)

Measures how much of the price range was directional movement versus noise. Returns a value between 0 and 1 — near 0 means choppy/range-bound, near 1 means strongly trending. Formula: |close_now − close_N_ago| / (highest_high − lowest_low).

Live Demo

Pick a market regime to see how ER(14) reacts:

Usage

import {ER} from 'trading-signals';
 
// ER yields results once 14 inputs have been added
const er = new ER(14);