Market Data

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

Description of all the types can be found here.

Market Data Request<V>

Market data request allows receiving market data on a subscription basis.

Tag	Name	Required	Example	Description
262	MDReqID	Y	1	Unique market data request Id
263	SubscriptionRequestType	Y	2	Subscription request type(see below)
267	NoMDEntryTypes	Y	2	Number of MDEntryType <269> fields requested. Should always be 2 for bid and offer.
269	=> MDEntryType	Y	0	Must be the first field in this repeating group. This is a list of all the types of Market Data Entries that the firm requesting the Market Data is interested in receiving (see below)
146	NoRelatedSym	Y	1	Number of symbols (instruments) requested. Should be 1.
55	=> Symbol	Y	BTC-USD	Requested instrument

Subscription Request Type	Description
1	Subscribe
2	Unsubscribe

MDEntryType	Description
0	Bid
1	Offer

Upon a successful subscription, a Market Data - Snapshot/Full Refresh <W> message is sent to the client, followed by subsequent Snapshot/Full Refresh <W> messages for each book update.

If the subscription fails, a Market Data Request Reject <Y> message is sent to the client.

Market Data - Snapshot/Full Refresh<W>

Market Data messages are used as the response to a Market Data Request<V> message. In all cases, one Market Data message refers only to one Market Data Request<V> . Each Market Data message contains information about only one symbol (instrument).

Tag	Name	Required	Example	Description
262	MDReqID	Y	1	Contains MDReqId<262> from corresponding Market Data Request
55	Symbol	Y	BTC-USD	Instrument
268	NoMDEntries	Y	1	Number of entries following. 0 for empty book.
269	=> MDEntryType	Y	0	Must be the first field of the repeating group. Entry type(see below)
270	=> MDEntryPx	Y	1	Price, value of type Price
271	=> MDEntrySize	Y	1	Size, value of type Size
20002	LpId	Y	123	FM id of an LP, providing the corresponding price stream

MDEntryType	Description
0	Bid
1	Offer

Example of the message

8=FIX.4.4|9=471|35=W|34=2|49=FINERYMARKETS|52=20250526-14:33:53.914|56=<api_key>|55=BTC-USD|262=1|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|20002=1|10=102

Market Data - Reject <Y>

The Market Data Request Reject<Y> is used when FineryMarkets cannot honor the Market Data Request<V> , due to business or technical reasons.

Tag	Name	Required	Example	Description
262	MDReqID	Y	1	Contains MDReqId<262> from corresponding Market Data Request
281	MDReqRejReason	N	0	Rejection reason code(see below)
58	Text	N	25	Contains FM error code if MDReqRejReason<281> == F

Rejection reason code	Description
0	Unknown symbol(instrument)
3	Insufficient Permissions
4	Unsupported SubscriptionRequestType <263>
F	Finery Markets error, see code in Text<58> field
A	Finery Markets error, see code in Text<58> field