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

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

Example

use finlib_ta::indicators::EfficiencyRatio;
use finlib_ta::Next;

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

Implementations

impl EfficiencyRatio

pub fn new(period: usize) -> Result<Self>

Trait Implementations

impl Clone for EfficiencyRatio

fn clone(&self) -> EfficiencyRatio

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for EfficiencyRatio

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

Formats the value using the given formatter.

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

type Output = f64

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

impl Next<f64> for EfficiencyRatio

type Output = f64

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

impl Period for EfficiencyRatio

fn period(&self) -> usize

impl Reset for EfficiencyRatio

fn reset(&mut self)