nautechsystems/nautilus_trader · error

Stop market order missing trigger_price

Error message

Stop market order missing trigger_price

What it means

dYdX STOP_MARKET orders are conditional orders that require a trigger_price. The client reads order.trigger_price() when building the on-chain message and throws this error if it is None. Without a trigger the exchange could not evaluate when to activate the order.

Source

Thrown at crates/adapters/dydx/src/execution/mod.rs:1468

                            client_metadata,
                            order.order_side(),
                            order
                                .price()
                                .ok_or_else(|| anyhow::anyhow!("Limit order missing price"))?,
                            order.quantity(),
                            order.time_in_force(),
                            order.is_post_only(),
                            order.is_reduce_only(),
                            block_height,
                            expire_time, // Uses default_short_term_expiry if configured
                        )?;
                        (msg, "limit")
                    }
                    // Conditional orders use their own expiration logic (not affected by default_short_term_expiry)
                    // They are always stored on-chain with long-term semantics
                    OrderType::StopMarket => {
                        let trigger_price = order.trigger_price().ok_or_else(|| {
                            anyhow::anyhow!("Stop market order missing trigger_price")
                        })?;
                        let cond_expire = order.expire_time().map(nanos_to_secs_i64);
                        let msg = order_builder.build_stop_market_order(
                            instrument_id,
                            client_id_u32,
                            client_metadata,
                            order.order_side(),
                            trigger_price,
                            order.quantity(),
                            order.is_reduce_only(),
                            cond_expire,
                        )?;
                        (msg, "stop_market")
                    }
                    OrderType::StopLimit => {
                        let trigger_price = order.trigger_price().ok_or_else(|| {
                            anyhow::anyhow!("Stop limit order missing trigger_price")
                        })?;

View on GitHub (pinned to 18893faf8b)

Solutions

1. Set trigger_price when creating the StopMarket order (order_factory.stop_market(..., trigger_price=...))
2. Validate trigger_price is present before submit
3. Confirm the order type mapping: Nautilus StopMarket requires a trigger on dYdX

Example fix

// before
let order = factory.stop_market(id, side, qty, None); // no trigger
// after
let order = factory.stop_market(id, side, qty, Some(trigger_price));

if order.order_type() == OrderType::StopMarket && order.trigger_price().is_none() {
    return Err("StopMarket order requires a trigger_price for dYdX".into());
}

fn has_trigger(order: &OrderAny) -> bool { order.trigger_price().is_some() }

if let Err(e) = client.submit_order(order).await {
    if e.to_string().contains("missing trigger_price") {
        // fix the order construction; retrying will not help
    }
}

When it happens

Trigger: Submitting a StopMarket order where trigger_price was never set on the Nautilus order (factory call omitted trigger_price, or the order type was changed from a plain market order).

Common situations: Order factory call missing the trigger_price parameter; converting an existing market order to stop-market without adding a trigger; deserialized/edited orders missing the trigger field.

Understand the failure class

Background: "missing required argument" and "the following required arguments were not provided": what required-argument errors mean and how to fix them — this error's family across 20 libraries.

Related errors

• Stop limit order missing trigger_price
• Stop limit order missing limit price
• Take profit market order missing trigger_price
• Take profit limit order missing trigger_price
• Execution PostOnly not supported for {order_type:?}

AI-assisted analysis of nautechsystems/nautilus_trader@18893faf8b (2026-09-08). Data as JSON: /api/errors/bd55abd130acbd27. Report an issue: GitHub.