Struct EfficiencyRatio

pub struct EfficiencyRatio { /* private fields */ }

Kaufman’s Efficiency Ratio (ER).

It is calculated by dividing the price change over a period by the absolute sum of the price movements that occurred to achieve that change. The resulting ratio ranges between 0.0 and 1.0 with higher values representing a more efficient or trending market.

Parameters

• length - number of periods (integer greater than 0)

Example

use ta::indicators::EfficiencyRatio;
use ta::{Calculate, Next};

let mut er = EfficiencyRatio::new(4).unwrap();
assert_eq!(er.calc(10.0), 1.0);
assert_eq!(er.calc(13.0), 1.0);
assert_eq!(er.calc(12.0), 0.5);
assert_eq!(er.calc(13.0), 0.6);
assert_eq!(er.calc(18.0), 0.8);
assert_eq!(er.calc(19.0), 0.75);

Implementations

impl EfficiencyRatio

pub fn new(length: u32) -> Result<Self>

Trait Implementations

impl Calculate for EfficiencyRatio

fn calc(&mut self, input: f64) -> f64

impl Default for EfficiencyRatio

fn default() -> Self

Returns the “default value” for a type.

impl Display for EfficiencyRatio

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: Close> Next<T> for EfficiencyRatio

fn next(&mut self, input: &T) -> f64

impl Reset for EfficiencyRatio

fn reset(&mut self)