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

# Time in force

> The order time-in-force options available on SX Bet: GTC, IOC, and FOK.

Every order carries a required `timeInForce`. It decides how your order behaves in the order book.

| `timeInForce`                   | Unmatched size                                                                | Use it for                                                           |
| ------------------------------- | ----------------------------------------------------------------------------- | -------------------------------------------------------------------- |
| **`GTC`** — good till cancelled | **Rests on the book** until filled, cancelled, or expired                     | Quoting. Providing liquidity.                                        |
| **`IOC`** — immediate or cancel | **Discarded.** Whatever matched is yours                                      | Taking what is available now, accepting a partial fill.              |
| **`FOK`** — fill or kill        | **Nothing executes.** The whole order is cancelled unless it fills completely | All-or-nothing execution. The only way to **take** parlay liquidity. |

A `GTC` order can still be a taker. If it crosses the book on arrival it matches immediately, and only
the remainder rests.

## Which one to use

| You want to                                                    | Use                                                                                            |
| -------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- |
| Quote a two-sided market and get filled over time              | `GTC`                                                                                          |
| Bet at the best available price, taking whatever size is there | `IOC`                                                                                          |
| Bet a specific amount or nothing                               | `FOK`                                                                                          |
| Take a parlay                                                  | `FOK` (`IOC` is rejected with `PARLAY_ORDER_MUST_NOT_BE_IOC`)                                  |
| Provide parlay liquidity                                       | `GTC`, with a real `expiry` no later than the parlay's                                         |
| Use bet credits                                                | `IOC` or `FOK` (a resting bet-credit order is rejected with `BET_CREDITS_REQUIRE_NON_RESTING`) |

## Related

<CardGroup cols={2}>
  <Card title="Posting orders" icon="paper-plane" href="/developers/posting-orders">
    Build, sign and submit an order of any type.
  </Card>

  <Card title="Taking liquidity" icon="bolt" href="/developers/taking-liquidity">
    The immediate-execution path, end to end.
  </Card>

  <Card title="Order lifecycle" icon="arrow-progress" href="/developers/order-lifecycle">
    `PENDING`, `ACTIVE`, `INACTIVE`, and every terminal reason.
  </Card>

  <Card title="Tracking your orders" icon="list-check" href="/developers/my-orders">
    `timeInForce` is write-only — tag it in your own store when you post.
  </Card>
</CardGroup>