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

# Multi-buy

> Place up to 20 interval buys in one order.

**Multi-buy** lets you pick outcomes across many interval markets and place them all with one tap. Each pick is its own independent buy. It is **not a parlay**: each window settles on its own, and winning one does not depend on winning another.

## Placing a multi-buy

<Steps>
  <Step title="Turn it on">
    On the **Interval** hub or a **Stocks** / **Crypto** page, switch on **Multi-buy**. The page reads "Tap any outcome to add it to your order."
  </Step>

  <Step title="Pick outcomes">
    Tap **Up** or **Down** on any card. Each pick becomes a leg in the slip, shown as "Up 51¢ · 15 min" with "to win \$X". One leg per market, up to **20 markets**.
  </Step>

  <Step title="Set the amount">
    Choose **$ per market**: **$1 / $5 / $10** (default \$5) or type an amount. The same amount applies to every leg.
  </Step>

  <Step title="Review">
    The slip, headed "Multi-buy N" with **Clear all**, shows **Total cost**, **Pays if every pick wins**, and your **Cash**. On a phone, the bottom bar reads "N picks · \$X" with a **Review** button.
  </Step>

  <Step title="Place">
    Tap **Place N orders · \$X**. Each leg fills against its own market's quote. You can add one take for the whole batch.
  </Step>
</Steps>

## Rules and limits

| Rule                  | Detail                                                                                                                             |
| --------------------- | ---------------------------------------------------------------------------------------------------------------------------------- |
| **Markets per order** | 20. Past that: "An order holds up to 20 markets — place this one first."                                                           |
| **Legs per market**   | One.                                                                                                                               |
| **Cost check**        | The whole order is refused if it costs more than your cash: "This order costs more than your cash — lower the amounts or deposit." |
| **Partial legs**      | If a market cannot fill the full amount: "Only \$X is on offer right now — the rest won't be spent."                               |
| **Refused legs**      | Legs that fail stay in the slip so you can retry them.                                                                             |
| **Unknown result**    | "We couldn't confirm this order. Check your positions before placing it again."                                                    |

Each leg follows the normal interval rules for fees, spread, and price protection. See [Placing interval orders](/interval/placing-orders).