> For the complete documentation index, see [llms.txt](https://docs.trade.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trade.xyz/perpetuals/changelog/market-parameters/10-25.md).

# 10/25

Historical xyz market-parameter update dated October 25.

| Instrument | Change                                                                                                                   |
| ---------- | ------------------------------------------------------------------------------------------------------------------------ |
| BIRD       | <p></p><ul><li>External and Internal session period updated</li><li>Discovery bound resets updated from 0 to 1</li></ul> |
| URNM       | <ul><li>External and Internal session period updated</li><li>Discovery bound resets updated from 0 to 1</li></ul>        |
| BB         | <p></p><ul><li>External and Internal session period updated</li><li>Discovery bound resets updated from 0 to 1</li></ul> |
| BOT        | <p></p><ul><li>External and Internal session period updated</li><li>Discovery bound resets updated from 0 to 1</li></ul> |
| EBAY       | <p></p><ul><li>External and Internal session period updated</li><li>Discovery bound resets updated from 0 to 1</li></ul> |
| ZM         | <p></p><ul><li>External and Internal session period updated</li><li>Discovery bound resets updated from 0 to 1</li></ul> |
| BX         | <p></p><ul><li>External and Internal session period updated</li><li>Discovery bound resets updated from 0 to 1</li></ul> |
| NCLD       | <p></p><ul><li>External and Internal session period updated</li></ul>                                                    |
| DKNG       | <p></p><ul><li>External and Internal session period updated</li></ul>                                                    |
| SHAZ       | <p></p><ul><li>External and Internal session period updated</li></ul>                                                    |
| COST       | <ul><li>Discovery bound range updated from 10% to 5%</li></ul>                                                           |
| EWT        | <ul><li>Discovery bound range updated from 5% to 10%</li></ul>                                                           |