Struct ta::indicators::OnBalanceVolume

pub struct OnBalanceVolume { /* fields omitted */ }

On Balance Volume (OBV).

The OBV is an volume and price based oscillator which gives cumulative total volumes. OBV measures buying and selling pressure as a cumulative indicator, adding volume on up days and subtracting it on down days.

Formula

If the closing price is above the prior close price then: Current OBV = Previous OBV + Current Volume

If the closing price is below the prior close price then: Current OBV = Previous OBV - Current Volume

If the closing prices equals the prior close price then: Current OBV = Previous OBV

Where:

obv - on the balance volume

Example

use ta::indicators::OnBalanceVolume;
use ta::{Next, DataItem};

let mut obv = OnBalanceVolume::new();

let di1 = DataItem::builder()
            .high(3.0)
            .low(1.0)
            .close(2.0)
            .open(1.5)
            .volume(1000.0)
            .build().unwrap();

let di2 = DataItem::builder()
            .high(3.0)
            .low(1.0)
            .close(1.5)
            .open(1.5)
            .volume(300.0)
            .build().unwrap();

assert_eq!(obv.next(&di1), 1000.0);
assert_eq!(obv.next(&di2), 700.0);

Links

• On Balance Volume, Wikipedia
• On Balance Volume, stockcharts

Methods

impl OnBalanceVolume

pub fn new() -> Self

Trait Implementations

impl Clone for OnBalanceVolume

fn clone(&self) -> OnBalanceVolume

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OnBalanceVolume

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

Formats the value using the given formatter.

impl Default for OnBalanceVolume

fn default() -> Self

Returns the "default value" for a type.

impl Display for OnBalanceVolume

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

Formats the value using the given formatter.

impl<'a, T: Close + Volume> Next<&'a T> for OnBalanceVolume

type Output = f64

fn next(&mut self, input: &'a T) -> f64

impl Reset for OnBalanceVolume

fn reset(&mut self)