> ## Documentation Index
> Fetch the complete documentation index at: https://docs.0x0.exchange/llms.txt
> Use this file to discover all available pages before exploring further.

# Order Types

Spectre supports the following standard order types.

## Supported Types

1. **LIMIT**: Buy or Sell at a specific price or better. Added to the book if not potentially matched.
2. **MARKET**: Buy or Sell immediately at the best available price.
3. **STOP\_MARKET**: Triggers a MARKET order when the index price crosses the `trigger_price`.
4. **STOP\_LIMIT**: Triggers a LIMIT order when the index price crosses the `trigger_price`.

## Time in Force

* **GTC (Good Till Cancelled)**: Default. Order stays in the book until matched or cancelled.
* **IOC (Immediate or Cancel)**: Requires the order to be matched immediately (partially or fully). Any unfilled portion is cancelled.
* **FOK (Fill or Kill)**: Requires the entire order to be executed immediately or cancelled completely.