use crate::{CandleComponent, CandleComponentUpdate, TakerTrade};
#[derive(Clone, Debug, Default)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct DirectionalVolumeRatio {
volume: f64,
buy_volume: f64,
}
impl CandleComponent<f64> for DirectionalVolumeRatio {
#[inline(always)]
fn value(&self) -> f64 {
self.buy_volume / self.volume
}
#[inline(always)]
fn reset(&mut self) {
self.volume = 0.0;
self.buy_volume = 0.0;
}
}
impl<T: TakerTrade> CandleComponentUpdate<T> for DirectionalVolumeRatio {
#[inline(always)]
fn update(&mut self, trade: &T) {
self.volume += trade.size().abs();
if trade.size() > 0.0 {
self.buy_volume += trade.size();
}
}
}
#[cfg(test)]
mod tests {
use round::round;
use super::*;
#[test]
fn volume_direction_ratio() {
let mut m = DirectionalVolumeRatio::default();
for t in &crate::candle_components::tests::TRADES {
m.update(t);
}
assert_eq!(round(m.value(), 4), 0.7143);
}
}