Struct RequestOpen 

pub struct RequestOpen {
    pub side: Side,
    pub price: Option<Decimal>,
    pub quantity: Decimal,
    pub kind: OrderKind,
    pub time_in_force: TimeInForce,
    pub position_id: Option<PositionId>,
    pub reduce_only: bool,
}

Parameters for opening a new order.

Warning: reduce_only Default Behavior

The reduce_only field defaults to false, which means:

• A Sell order defaults to SellToOpen (open short / write option)
• A Buy order defaults to BuyToOpen (open long)

For closing positions, callers MUST explicitly set reduce_only: true. Failure to do so on non-crypto instruments (equities, options) will:

• On non-margin accounts: result in a 422 rejection from the exchange
• On margin accounts: silently open a short position instead of closing the long

The close_open_positions_with_market_orders helper sets this correctly. Direct RequestOpen construction must handle it manually.

Fields

side: Side

price: Option<Decimal>

Limit price for the order. Required for Limit/StopLimit/TrailingStopLimit orders. None for Market/Stop/TrailingStop orders (which execute at market price when triggered).

quantity: Decimal

kind: OrderKind

time_in_force: TimeInForce

position_id: Option<PositionId>

Target PositionId for this order in OmsMode::Hedging.

For opening orders: the position this fill should open or add to. For closing orders: the position this fill should reduce or close. In OmsMode::Netting, leave as None (ignored).

reduce_only: bool

Constrain this order to only reduce existing positions, never open new ones.

Used by exchanges that require explicit open/close intent (Alpaca, Interactive Brokers, Schwab). Adapters derive venue-specific semantics from this flag + side:

• reduce_only=false, Buy → BuyToOpen (open long / add to long)
• reduce_only=false, Sell → SellToOpen (open short / write option)
• reduce_only=true, Buy → BuyToClose (close short)
• reduce_only=true, Sell → SellToClose (close long)

Exchanges that infer intent from positions (Binance, Deribit) may map this to their reduceOnly parameter or ignore it entirely.

Trait Implementations

impl Clone for RequestOpen

fn clone(&self) -> RequestOpen

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RequestOpen

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for RequestOpen

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for RequestOpen

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for RequestOpen

fn cmp(&self, other: &RequestOpen) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for RequestOpen

fn eq(&self, other: &RequestOpen) -> 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 PartialOrd for RequestOpen

fn partial_cmp(&self, other: &RequestOpen) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for RequestOpen

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for RequestOpen

impl StructuralPartialEq for RequestOpen