> ## 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.

# Why didn't my order fill?

Common reasons: the limit price was never reached; the order fell outside the active price band and was rejected at submission; it was cancelled before matching; or there was insufficient margin.

The interface and order history show the specific reason in each case.