# Trade IDs

Molecule currently offers two different trade IDs:

* **M.ID** (sometimes called `trade_id`, `id`, or `m_id`): this is a guaranteed-unique ID for a trade. Is sequential, but will have variable-length gaps between trades in your account.
* **Friendly ID**: this is an ID specific to your account. It will not have gaps between trades (other than for deleted trades or [Cascading](https://help.molecule.io/core-functionality/core-features/specialized-features/cascading) trades). However, this field is deprecated.

<mark style="background-color:red;">Friendly ID is deprecated and will be removed in a future release. As such, we recommend relying on M.ID.</mark>

***

<br>