Error responses

Order and cancel errors are usually returned as a vector with same length as the batched request.

Below is a list of possible batched error responses:

Error source	Error type	Error string
Order	Tick	Price must be divisible by tick size.
Order	MinTradeNtl	Order must have minimum value of $10
Order	Margin	Insufficient margin to place order.
Order	ReduceOnly	Reduce only order would increase position.
Order	BadAloPx	Post only order would have immediately matched, bbo was {bbo}.
Order	IocCancel	Order could not immediately match against any resting orders.
Order	BadTriggerPx	Invalid TP/SL price.
Order	MarketOrderNoLiquidity	No liquidity available for market order.
Cancel	MissingOrder	Order was never placed, already canceled, or filled.

Important: Some errors are a deterministic function of the payload itself, and these are instead returned earlier as part of pre-validation. In this case only one error is returned for the entire payload, as some of these errors do not apply to a specific order or cancel.

Examples include: empty batch of orders, non-reduce-only TP/SL orders, and some forms of tick size validation.

For API users that use batching, it's recommended to handle the case where a single error is returned for a batch of multiple orders. In this case, the response could be duplicated ntimes before being sent to the callback function, as the whole batch was rejected for this same reason.