Median level lifetime
Updated
What is Median level lifetime?
Median level lifetime is a market-data metric BlackForge measures for every listed pair on nine spot exchanges, once per closed five-minute window. Median lifetime of levels born and killed inside the window. It reports what the order book or trade tape showed, not what price will do next.
The facts
| Unit | ms |
|---|---|
| Family | Book churn |
| Key | levelLifetimeMedianTime |
| Quote-relative | No |
| Nullable | No |
| Plottable | Yes |
| Available from | Max plan |
Live across all nine venues
Median level lifetime 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 | Median level lifetime |
|---|---|---|
| Binance | BTCUSDT | 1,900 |
| Bitget | BTCUSDT | 599 |
| Bybit | BTCUSDT | 999 |
| Coinbase | BTC-USDT | 222 |
| Gate | BTC_USDT | 432 |
| Kraken | BTCUSDT | 712 |
| Kucoin | BTC-USDT | 232 |
| Mexc | BTCUSDT | 100 |
| Okx | BTC-USDT | 700 |
Query it
Median level lifetime is one field on the wide row /v1/latest returns for a pair. Set $BF to the API base and read it at .values.levelLifetimeMedianTime:
curl -H "x-api-key: $BLACKFORGE_API_KEY" \
"$BF/v1/latest?exchange=binance&symbol=BTCUSDT"
# read the value at: .values.levelLifetimeMedianTimeRelated
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 Median level lifetime?
Median level lifetime is a market-data metric BlackForge measures for every listed pair on nine spot exchanges, once per closed five-minute window. Median lifetime of levels born and killed inside the window. It reports what the order book or trade tape showed, not what price will do next.
How is Median level lifetime measured?
BlackForge computes Median level lifetime from each venue’s own order book and trades for every listed pair, once per closed five-minute window, and records it as ms. The value is stored exactly as observed.
Which plan includes Median level lifetime?
Median level lifetime is available from the Max plan upward, and on pay-per-call over x402. See pricing for the full plan ladder.
Does Median level lifetime predict where price will go?
No. Median level lifetime 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.