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

# Market node venues and sides

> Configure Market nodes for Polymarket or Kalshi and choose YES/NO exposure.

Market nodes support two prediction venues:

* `polymarket` (default)
* `kalshi`

## Venue selection

In node configuration, set the market venue first, then choose the market reference for that venue:

* **Polymarket:** token ID-backed markets.
* **Kalshi:** Kalshi ticker-backed markets (for example `INXD-26DEC29-T4500`).

The selected venue is persisted on the node, so downstream pricing and execution use the correct market source.

## YES/NO side selection

Market nodes can track either side of the market:

* **YES side:** direct yes price/bid/ask.
* **NO side:** inverted probability from YES where needed, while preserving spread semantics for that side.

Use side selection when your strategy thesis is explicitly contra to the base market statement.

## Update cadence differences

* **Polymarket:** live updates are streamed from WebSocket market data.
* **Kalshi:** market updates are REST-polled (no public unauthenticated WS stream in current integration path).

Because of that, Kalshi node charts and price changes can appear less granular than Polymarket live charts.