Bitcoin Liquid Index

The BNC Bitcoin Liquid Index (BLX) API, calculates a USD price point for one bitcoin at tick intervals of 30 seconds, as calculated by the extensive BNC-BLX methodology. This API offers a live feed & support for fine granularity historic tick-data for bitcoin market trading, dating back to the beginning of trading on MtGox in early 2010. End-of-Day (EOD), OHLCV, Time & Volume-Weighted-Averages (T-WAP & V-WAP) also included.

Key Features

  • 30 second indexed ticks based upon the full trade history of each constituent.
  • Fine granularity allows construction of OHLCV charting at fine intervals.
  • Daily OHLCV, T-WAP/ V-WAP.
  • All ticks and EOD data time-stamped in UTC and published with a precision rounded to 8 decimal places.

Key Benefits

BNC has developed the Liquid Index product to meet the market requirement for a single reliable fair price for Bitcoin based on the majority of trusted real-world trading activity.

  • Designed to respond to sudden market movements while avoiding index manipulation through a robust index methodology.
  • Use a trusted, industry-standard bitcoin index API, used by many blockchain industry companies.
  • Access institutional quality, historic & live bitcoin price index data through an easy-to-use API.
  • Easily embed the BNC-BLX in your applications, including websites, mobile apps and other corporate applications.
  • Dramatically reduce time to market for apps that require bitcoin price data.
  • Eliminate the pain and complexity of legacy feeds by using cloud API's.
  • Developer documentation and additional info available on our dedicated API page.  
  • Greater and more accurate data coverage than any other bitcoin index available today.
  • Trader's advantage: Technical Analysis (TA) becomes much more accurate when using the BNC-BLX as opposed to a typical single-exchange TA.

Data Coverage At-A-Glance

  • Asset Classes: Digital Currencies
  • Data Type: Index & EOD for bitcoin
  • Data Treatment: Cleaned in real-time down to individual exchange trade-per tick level.
  • Frequency: 30 sec ticks & daily EOD
  • Constituents: Qualified key international cryptocurrency exchanges.
  • Historical Rates: Are available to a fine 30sec granularity, stretching back to the beginning of trading on MtGox in early 2010. See our Digital Currency Exchange Rates API for historical rates.

The following exchanges contribute reliable, real-time, public market data to BNC and have met the BLX constituency requirements for index entry. 

ConstituentsTrading Pairs
Bitfinex BTC/USD
Bitstamp BTC/USD
Gemini BTC/USD
Kraken BTC/EUR
BTC-e BTC/USD    (From Q3 2011 to Q3 2016)
BTCC BTC/CNY    (From Q3 2011 to Q2 2017)
Coinsetter BTC/USD    (From Q3 2014 to Q1 2016)
MtGox BTC/USD    (From July 2010 - 2014 only)
OKcoin International BTC/USD    (From Q3 2014 to Q2 2017)


The BNC-BLX was constructed to create a truly comprehensive Bitcoin Price Index for:

  • Robust Historic Index: Full market-wide historic index for an accurate view across all major trading platforms since trading began in early 2010. 
  • Live Index: Live or End-of-Day (EOD) feed, purpose built for settlement of various derivatives and accurate reference price for general trade & commerce.

The Liquid Index calculates a USD price point for one bitcoin at tick intervals of 30 seconds. Incoming transactions are evaluated carefully for inclusion in the calculation as part of this real-time process.
The volume weighted average of the transactions from each exchange is taken and then the base exchange prices are combined using BNC's proprietary technique, rules-based on the trading history and orderbook depth preceding the tick. It is designed to allow the Index to be responsive to sudden market movement while limiting the impact of outlier transactions.

Transactions that are not in USD are converted at official current international rates. Currently, this only applies to trades from Kraken for their BTC/EUR Transactions. 
The calculation parameters & index constituents are re-evaluated on a quarterly review basis.

The result is a superior index which portrays the majority of all legitimate bitcoin trading activity globally, for professional and enterprise use.

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