AvgPxIndicator (FIX tag 819)

intFIX 4.4

AvgPxIndicator (tag 819) is an int field defined in FIX 4.4. It appears in 1 message type, always optionally. It is an enumerated field with 3 defined values.

At a glance

Tag: 819
Name: AvgPxIndicator
Datatype: int
Dialects: FIX 4.4
Messages: 1
Valid values: 3

What the specification says

Average Pricing Indicator

Descriptions are quoted from the FIX Orchestra sources under the Apache 2.0 licence.

A real message using tag 819

TradeCaptureReport · FIX 4.4

Tag	Field	Wire value	Meaning
8	BeginString	FIX.4.4
9	BodyLength	171
35	MsgType	AE	Trade Capture Report
49	SenderCompID	BOARTEAM
56	TargetCompID	COUNTERPARTY
34	MsgSeqNum	2
52	SendingTime	20240101-12:00:00.000
571	TradeReportID	EXAMPLE
570	PreviouslyReported	N	not reported to counterparty
32	LastQty	1000000
31	LastPx	1.09210
75	TradeDate	20240101
819	AvgPxIndicator	0	No Average Pricing
60	TransactTime	20240101-12:00:00.000
552	NoSides1 entry	1	repeating group
54	Side	1	Buy
37	OrderID	ORD-10042
10	CheckSum	188

Edit and decode it yourself

Shown with | separators for readability. On the wire FIX uses SOH (0x01), an invisible control byte — and because BodyLength and CheckSum are computed over the actual bytes, the two forms have different checksums. Both are valid and both decode here.

Open in the full decoder →

Generated from the FIX 4.4 dictionary and verified at build time: it parses and validates with no issues. Open the decoder to try your own message.

Valid values

A value outside this list is not a parse error — the message still decodes — but validate() reports it as validate/value-not-in-enum.

Value	Meaning	Symbolic name
0	No Average Pricing	NO_AVERAGE_PRICING
1	Trade is part of an average price group identified by the TradeLinkID	TRADE_IS_PART_OF_AN_AVERAGE_PRICE_GROUP_IDENTIFIED_BY_THE_TRADELINKID
2	Last Trade in the average price group identified by the TradeLinkID	LAST_TRADE_IN_THE_AVERAGE_PRICE_GROUP_IDENTIFIED_BY_THE_TRADELINKID

Where tag 819 appears

Requiredness is a property of the message, not of the field: the same tag can be optional in one message and conditionally required in another.

Message	MsgType	Requiredness	Where in the message
TradeCaptureReport	AE	Optional	directly on the message body

Wire format

A whole number, optionally signed. Leading zeros are legal on the wire and are preserved in the raw value. @boarteam/fix parses the value as a number and reports parse/invalid-int when it does not lex as one; the raw string is kept either way.

Read tag 819 in TypeScript

decode.tsts

import { createFixEngine } from "@boarteam/fix";import { dictionary } from "@boarteam/fix-dict-fix44";const fix = createFixEngine(dictionary);const { message, issues } = fix.parse(raw);const avgPxIndicator = message.fields[819]?.raw;// e.g. "0" — No Average Pricing// The dictionary also carries the labels:const label = fix.dictionary  .fieldByTag(819)  ?.enumValues?.find((e) => e.value === avgPxIndicator)  ?.description;

Decode this in your own code

The same engine that produced the decoded example above is an Apache-2.0 npm package with zero runtime dependencies. It runs in Node and in the browser, and parse() returns problems as data instead of throwing.

npm i @boarteam/fix @boarteam/fix-dict-fix44

Try the decoder Source on GitHub