> For the complete documentation index, see [llms.txt](https://size.club/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://size.club/docs/how-size-works/the-loop.md).

# The loop

Size's core loop is short on purpose.

```mermaid
flowchart LR
 Key --> Trial --> Life --> Trade --> Payout
```

1. Get a [Key](/docs/how-size-works/what-is-a-key.md) (free on signup, or buy in the Store).
2. Open Trials. Run [Practice](/docs/playing-a-trial/practice-trials.md) first if you are new, then use a Key.
3. Finish #1 → earn a [Life](/docs/after-you-win/earn-a-life.md).
4. [Trade](/docs/after-you-win/trade-on-your-life.md) on that Life in the Terminal.
5. Take a [Payout](/docs/after-you-win/profit-split-and-payouts.md): transfer your earnings to your wallet.

At every step, the most you can lose is the Key you played. See [What you risk and what you can win](/docs/how-size-works/what-you-risk-and-what-you-can-win.md).

After every Trial, open [Your Grading](/docs/playing-a-trial/your-grading.md).

Win condition detail: [How to win](/docs/playing-a-trial/how-to-win.md).


---

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