> ## Documentation Index
> Fetch the complete documentation index at: https://help.arcus.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# What order types are supported at launch?

* **Market orders**: Immediate fill at the best available price; fast, but subject to slippage in thin or fast markets (expected and max slippage shown before you submit).
* **Limit orders**: Fills at your price or better, resting until matched or cancelled; passive fills that rest on the book can earn maker rebates upon matching.
* **Stop-market / stop-limit orders**: Activates when the mark price crosses your trigger, then executes as a market order (stop-market) or places a limit (stop-limit). Triggers on the mark price, not the last price, to avoid triggering on stray prints.
* **Take-profit / stop-loss**: Conditional orders that close a position when the mark hits a target or threshold; attach to an open position or set at entry. Also mark-price-based.