Open price
Updated
What is Open price?
Open price is a market-data metric BlackForge measures for every listed pair on nine spot exchanges, once per closed five-minute window. The price at the start of the window. It reports what the order book or trade tape showed, not what price will do next.
The facts
| Unit | price |
|---|---|
| Family | Price |
| Key | priceOpen |
| Quote-relative | No |
| Nullable | No |
| Plottable | Yes |
| Available from | Free plan |
Live across all nine venues
Open price 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 | Open price |
|---|---|---|
| Binance | BTCUSDT | 83,679 |
| Bitget | BTCUSDT | 83,681 |
| Bybit | BTCUSDT | 83,677 |
| Coinbase | BTC-USDT | 83,652 |
| Gate | BTC_USDT | 83,672 |
| Kraken | BTCUSDT | 83,667 |
| Kucoin | BTC-USDT | 83,675 |
| Mexc | BTCUSDT | 83,684 |
| Okx | BTC-USDT | 83,680 |
Query it
Open price is one field on the wide row /v1/latest returns for a pair. Set $BF to the API base and read it at .values.priceOpen:
curl -H "x-api-key: $BLACKFORGE_API_KEY" \
"$BF/v1/latest?exchange=binance&symbol=BTCUSDT"
# read the value at: .values.priceOpenRelated
The open, high, low and last trade price in the window.
← All Price and every other metric · Coverage by venue
What is Open price?
Open price is a market-data metric BlackForge measures for every listed pair on nine spot exchanges, once per closed five-minute window. The price at the start of the window. It reports what the order book or trade tape showed, not what price will do next.
How is Open price measured?
BlackForge computes Open price from each venue’s own order book and trades for every listed pair, once per closed five-minute window, and records it as price. The value is stored exactly as observed.
Which plan includes Open price?
Open price is available from the Free plan upward, and on pay-per-call over x402. See pricing for the full plan ladder.
Does Open price predict where price will go?
No. Open price 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.