> For the complete documentation index, see [llms.txt](https://docs.flash.trade/flash-trade/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flash.trade/flash-trade/flash-trade-protocol/build-on-flash/flash-trade-v2/concepts/prices-and-markets.md).

# Prices & markets

## Prices

Prices come from **Pyth Lazer** feeds, filtered to the tokens present in the pool config. Read them with [`GET /prices`](/flash-trade/flash-trade-protocol/build-on-flash/flash-trade-v2/reference/market-data.md#prices) or [`GET /prices/{symbol}`](/flash-trade/flash-trade-protocol/build-on-flash/flash-trade-v2/reference/market-data.md#prices-symbol).

Each price is an integer plus an exponent — apply `price × 10^exponent`, or just read `priceUi`:

```json
{ "price": 54812000000, "exponent": -8, "priceUi": 548.12, "marketSession": "regular", "timestampUs": 1717407600000000 }
```

## Market sessions

Some markets are equities (e.g. SPY, MSTR, CRCL) that only trade during market hours. Every price carries a `marketSession` so you can reflect the current session in your UI:

| Value        | Meaning               |
| ------------ | --------------------- |
| `regular`    | Regular trading hours |
| `preMarket`  | Pre-market session    |
| `postMarket` | After-hours session   |
| `overNight`  | Overnight session     |
| `closed`     | Market closed         |

When a market is closed and has no fresh price, price and trade endpoints for that symbol can return `503`.

## Markets

A market is a `(target custody, collateral custody, side)` triple. You never construct that yourself — pass `marketSymbol` + `side` and the backend resolves the market against the live pool config. Enumerate raw markets, pools, and custodies under [Market data](/flash-trade/flash-trade-protocol/build-on-flash/flash-trade-v2/reference/market-data.md).


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