Struct Position 

pub struct Position {
    pub qty: f64,
    pub entry_price: Option<f64>,
    pub unrealised_pnl: f64,
}

Current exchange-reported position for a single symbol.

qty is signed: positive = long, negative = short, zero = flat.

Example

use rustrade_core::{Position, Side};

// A 2-contract long opened at 100.
let long = Position {
    qty: 2.0,
    entry_price: Some(100.0),
    unrealised_pnl: 0.0,
};
assert!(!long.is_flat());
assert_eq!(long.close_side(), Some(Side::Sell)); // close a long with a sell

// The constant for "no position".
assert!(Position::FLAT.is_flat());
assert!(Position::FLAT.close_side().is_none());

Fields

qty: f64

Signed position size — positive = long, negative = short.

entry_price: Option<f64>

Average entry price (weighted by qty if multiple opens), or None for a flat position.

unrealised_pnl: f64

Unrealised PnL at the most recent mark price, in quote currency.

Implementations

impl Position

pub const FLAT: Position

A flat (zero-size) position with no entry price.

pub fn is_flat(&self) -> bool

true when qty == 0.

pub fn is_long(&self) -> bool

true when qty > 0.

pub fn is_short(&self) -> bool

true when qty < 0.

pub fn close_side(&self) -> Option<Side>

Side needed to fully close this position (None if flat).

Trait Implementations

impl Clone for Position

fn clone(&self) -> Position

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Position

impl Debug for Position

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

Formats the value using the given formatter.

impl Default for Position

fn default() -> Position

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Position

fn deserialize<__D>( __deserializer: __D, ) -> Result<Position, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Position

fn eq(&self, other: &Position) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Position

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Position