> ## Documentation Index
> Fetch the complete documentation index at: https://docs.meridiandata.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Tick bars

> Bars that close after a configured number of Binance aggTrade records.

A tick bar assigns a value of one to every normalized Binance aggTrade record:

```text theme={null}
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.

## Query example

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

## 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.