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A tick bar assigns a value of one to every normalized Binance aggTrade record: 
tick_count += 1
close when tick_count >= threshold
For integer thresholds, every completed bar contains exactly that many aggTrade records. The unfinished trailing bar remains in processor state until more trades arrive.

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Query example

{
  "exchange": "binance-futures",
  "product": "BTCUSDT",
  "bar_type": "tick",
  "begin": "2026-01-01T00:00:00Z",
  "end": "2026-01-02T00:00:00Z",
  "threshold": 1000,
  "limit": 1000
}

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Interpretation

  • Bar duration contracts during active markets and expands during quiet markets.
  • Coin and dollar volume vary between bars.
  • trade_count refers to aggTrade records.
  • Tick bars do not imply that every underlying matching-engine fill is individually represented.