FTB-C000298 / Implementation concept

Closed Bar

Closed Bar is a bar whose aggregation interval has finished under the feed's finalization contract.

Also known asfinalized candlecompleted bar

Definitions

In plain terms

It is normally safe for end-of-bar calculations once late corrections and revision policy are considered.

Technical

The record should retain interval endpoints, close flag, event time, sequence, source, correction status, and knowledge cutoff.

Scope

Closed does not always mean immutable; a provider may later correct the bar.

Examples

  • A governed lesson uses Closed Bar only with declared inputs, timing, parameters, and edge-case behavior.

Common misconceptions

  • Closed does not always mean immutable; a provider may later correct the bar.

Concept relationships

Where this concept is used

Tutorials planned

These catalogued topics use this concept, but their complete build has not shipped yet.

  • D06-F01-A01 Important
  • D06-F01-A02 Prerequisite
  • D07-F02-A03 Important
  • D07-F02-A04 Important
  • D07-F02-A07 Prerequisite
  • D07-F02-A08 Prerequisite
  • D07-F03-A01 Important
  • D07-F03-A02 Important
  • D07-F03-A06 Important
  • D07-F03-A08 Important
  • D07-F04-A01 Prerequisite
  • D07-F04-A05 Prerequisite
  • D08-F01-A01 Prerequisite
  • D08-F01-A02 Prerequisite

Evidence and governance

  1. Kline/Candlestick Streams for UTC Binance · official platform documentation

    Supports: preferred label, short definition, technical definition

    Limits: The contract is specific to Binance Spot streams and does not define every venue's candle or finalization semantics.

Reviewed by
fintech-builder-batch-006
Last reviewed
2026-07-27
Next review
2027-07-27
Record status
published
Written by

Fintech engineer building market-data and financial systems, and the author of every article, glossary record, and reference implementation on The Fintech Builder.