Book level change count
Updated
What is Book level change count?
Book level change count is a market-data metric BlackForge measures for every listed pair on nine spot exchanges, once per closed five-minute window. Price-level changes recorded in the window: one per level whose size actually moved, additions and removals alike, both sides. A level re-broadcast at its existing size is not counted.
The facts
| Unit | count |
|---|---|
| Family | Book churn |
| Key | bookLevelChangeCount |
| Quote-relative | No |
| Nullable | No |
| Plottable | Yes |
| Available from | Pro plan |
Live across all nine venues
Book level change count for BTC-USDT, as measured in the latest closed window on each venue. Observed . A venue with no reading for this window shows an em dash — nothing is invented.
| Venue | Symbol | Book level change count |
|---|---|---|
| Binance | BTCUSDT | 66,088 |
| Bitget | BTCUSDT | 48,124 |
| Bybit | BTCUSDT | 37,318 |
| Coinbase | BTC-USDT | 21,021 |
| Gate | BTC_USDT | 24,458 |
| Kraken | BTCUSDT | 20,077 |
| Kucoin | BTC-USDT | 143,738 |
| Mexc | BTCUSDT | 119,560 |
| Okx | BTC-USDT | 40,478 |
Query it
Book level change count is one field on the wide row /v1/latest returns for a pair. Set $BF to the API base and read it at .values.bookLevelChangeCount:
curl -H "x-api-key: $BLACKFORGE_API_KEY" \
"$BF/v1/latest?exchange=binance&symbol=BTCUSDT"
# read the value at: .values.bookLevelChangeCountRelated
Liquidity added and removed, price levels changed, and how long a level survives before it is pulled.
Defined in the glossary: Liquidity added and removed, Resting order lifetime.
← All Book churn and every other metric · Coverage by venue
What is Book level change count?
Book level change count is a market-data metric BlackForge measures for every listed pair on nine spot exchanges, once per closed five-minute window. Price-level changes recorded in the window: one per level whose size actually moved, additions and removals alike, both sides. A level re-broadcast at its existing size is not counted.
How is Book level change count measured?
BlackForge computes Book level change count from each venue’s own order book and trades for every listed pair, once per closed five-minute window, and records it as count. The value is stored exactly as observed.
Which plan includes Book level change count?
Book level change count is available from the Pro plan upward, and on pay-per-call over x402. See pricing for the full plan ladder.
Does Book level change count predict where price will go?
No. Book level change count is a measurement of what the order book or trade tape showed in the window. It carries no view on future price, and BlackForge scores nothing — every metric is a measurement, not a call.