Incremental Refresh <X>

Tag	Field Name	Data Type	Req’d	Comments
Standard header - Outgoing			Y	MsgType (35) = X
262	MDReqID	string	Y	Unique identifier for Market Data Request
268	NoMDEntries	int	Y	Number of repeating groups (↺) following
↺ 54	Side	Int	N	When MDEntryType=TRADE (`269=2`), this tag will appear to indicate if the trade aggressor. Valid values: `1` - Buy `2` - Sell
↺ 279	MDUpdateAction	int	Y	Type of Market Data update action. Valid values: `0` - New `1` - Change `2` - Delete
↺ 269	MDEntryType	char	Y	"Entries that the firm requesting the Market Data is interested in receiving. There can be multiple fields, as defined by field `<267>`. Valid values: `0` - Bid `1` - Offer `2` - Trade `4` - Opening Price `5` - Closing Price `7` - 24h (rolling window) High Price `8` - 24h (rolling window) Low Price `B` - 24h (rolling window) Trade Volume
↺ 55	Symbol	string	C	Currency-pair. It is identified only for first market data entry.
↺ 270	MDEntryPx	price	C	Price of the Market Data Entry. Required when MDEntryType `<269>` is not Trade Volume (B) and NumbersOfOrders(346) is non-zero.
↺ 271	MDEntrySize	float	C	Number of units available (or the maximum trade size) at the time the market data snapshot was generated. Required when MDEntryType `<269>` is Bid (0), Offer (1), Trade (2) or Trade Volume (B) and NumbersOfOrders(346) is non-zero.
↺ 272	MDEntryDate	timestamp	N	UTC date of rate data i.e. yyyyMMdd.
↺ 273	MDEntryTime	timestamp	N	UTC time of rate data.
↺ 336	TradingSessionID	string	Y	Identifier for Trading Session. Valid values: `CONTINUOUSOSL`
↺ 346	NumberOfOrders	int	C	Number of orders in the market where MDEntryType `<269>` is Bid (0) or Offer (1).
↺ 290	MDEntryPositionNo	int	C	Display position of a bid or offer, numbered from most competitive to least competitive where MDEntryType `<269>` is Bid (0) or Offer (1) and NumbersOfOrders(346) is non-zero.
Standard trailer			Y