# Market Data

Every price or size values should be represented with FineryMarkets internal corresponding types.

Description of all the types can be found [here](https://faq.finerymarkets.com/api-reference/data-types).

## **Market Data - Snapshot/Full Refresh\<W>**

Market Data messages are used to transmit updates related to the instrument. Each message contains data for a single symbol (instrument) only. If an invalid update is received, it is ignored and the connection will be closed.

<table><thead><tr><th width="150" align="center">Tag</th><th width="200" align="center">Name</th><th width="150" align="center">Required</th><th align="center">Example</th><th align="center">Description</th></tr></thead><tbody><tr><td align="center">55</td><td align="center">Symbol</td><td align="center">N</td><td align="center">BTC-USD</td><td align="center">Instrument. Should match the instrument of the stream with ID StreamID&#x3C;20000></td></tr><tr><td align="center">268</td><td align="center">NoMDEntries</td><td align="center">Y</td><td align="center">1</td><td align="center">Number of entries following. 0 for empty book.</td></tr><tr><td align="center">269</td><td align="center">=> MDEntryType</td><td align="center">Y</td><td align="center">0</td><td align="center">Must be the first field of the repeating group. Entry type(see below)</td></tr><tr><td align="center">270</td><td align="center">=> MDEntryPx</td><td align="center">Y</td><td align="center">1</td><td align="center">Price, value of type Price</td></tr><tr><td align="center">271</td><td align="center">=> MDEntrySize</td><td align="center">Y</td><td align="center">1</td><td align="center">Size, value of type Size</td></tr><tr><td align="center">20000</td><td align="center">StreamID</td><td align="center">Y</td><td align="center">11e61d3e-804c-4b60-bf27-d217f086a1f9</td><td align="center">ID of a stream this update relates to</td></tr></tbody></table>

| MDEntryType | Description |
| :---------: | :---------: |
|      0      |     Bid     |
|      1      |    Offer    |

<details>

<summary>Example of the message</summary>

{% code overflow="wrap" lineNumbers="true" %}

```
8=FIX.4.4|9=489|35=W|34=2|49=<api_key>|52=20250526-14:33:53.808|56=FINERYMARKETS|268=10|269=0|270=500000000|271=500000000|269=0|270=400000000|271=400000000|269=0|270=300000000|271=300000000|269=0|270=200000000|271=200000000|269=0|270=100000000|271=100000000|269=1|270=100000000|271=100000000|269=1|270=200000000|271=200000000|269=1|270=300000000|271=300000000|269=1|270=400000000|271=400000000|269=1|270=500000000|271=500000000|20000=f7657b96-4b8c-4054-bc7a-0cb355363655|10=000
```

{% endcode %}

</details>