> For the complete documentation index, see [llms.txt](https://xyro-io.gitbook.io/xyro-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xyro-io.gitbook.io/xyro-whitepaper/game-modes/1-up-down.md).

# 1️⃣ Up/Down

**Up/Down** is the quickest and easiest out of the four games: initially only one cryptocurrency (BTC) and only two options - up or down. A player needs to guess if the price will be higher or lower at a certain point from the moment when the timer is reset.

<figure><img src="https://2954760131-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXYqvmpV2LxaiwKagjxkl%2Fuploads%2F9O1QqStMU9ciZLR7i2mA%2FFrame%201948759502.png?alt=media&amp;token=6890714d-4e0b-4c19-82d3-2338f2c82ea6" alt=""><figcaption></figcaption></figure>

There’s no need to name a specific price target: if you select “Up” and the future price is above the initial price even by $0.01, you win.&#x20;

A user needs to lock up an amount of USDT on Arbitrum to play. All the submitted funds are automatically grouped into two pools: Up and Down. Users can view how much money and how many players are in each pool, and what the potential payout is in case of winning.&#x20;

There’s also a timer showing the time remaining until the end of the game round. Players have limited time to make their decision and click a button, after which they have to wait for the result.&#x20;

The reward is determined by the size of one’s bid and the sizes of the two pools. The remaining pool is shared among the winners after a platform fee is deducted. This fee, covered by the losing team, amounts to 15% for guesses between 1 and 5, and 10% for guesses between 5 and 20.

📌 **Example:**\
\
The initial BTC price is 67,500; some minutes later it reaches $67,550, so those who voted “Up” win. At the end of the cycle, the Up pool has 100 users and $1500 in USDT, while the Down pool has 80 users and 1200 USDT. Bob’s Up bid was $25, or 1/60 of the total Up pool. Therefore, his reward will be (taking into account the 10% platform fee) 1/60 of the Down pool size, or 1200\*0.99/60=$18.&#x20;

That’s a 72% profit rate on a 0.105% price move. If Bob was margin trading instead of using XYRO, he would need to use 800x leverage – and would almost certainly get liquidated on intraday volatility. In other words, the Up/Down provides better returns than any major leverage trading platform.

**December 2024** update: we’ve made some corrections to the fee calculation algorithm for Up/Down - hopefully you’ll find that the result of each game is now even more fair.