Polymarket ETH Up/Down 24h historical order book & trade data
6.19M order-book and trade events for ETH daily Up/Down markets since 2025-06-01 — about 12,088 events a day across 1 windows.
Coverage
ETH Up/Down 24h data coverage
What is recorded, how often it updates and how much there is.
History start
2025-06-01
512 days of history
Events recorded
6,189,300
≈ 6.19M as of 2026-10-25
Avg events / day
12,088
book snapshot · book delta · trade · resolution
Update frequency
Book deltas and trades streamed as they occur; one new window per day
Daily activity · last 30 days
Indicative daily event volume, last 30 days to 2026-10-25. Shape modeled from collector stats; mean matches the average events/day above.
About this market
What is ETH Up/Down 24h?
Daily ETH Up/Down is the market where ETH-specific news — upgrades, ETF headlines, treasury-company buying — has the most time to be priced in before settlement. The daily market is a single Up/Down binary per day: it opens around midday New York time and resolves 24 hours later on whether the price finished above where it started.
Ether usually moves with Bitcoin but with a larger amplitude, so the Up/Down outcome is a bet on beta as much as direction. Over a daily horizon, ETH also reacts to things BTC ignores: ETH/BTC rotations, staking and ETF-flow headlines, and DeFi liquidations that dump collateral into the market. When BTC is quiet, those ETH-specific catalysts are what flip an Up/Down window.
A daily market stays open long enough for the book to deepen and for informed traders to build positions across a whole session, so the data looks different from the short windows: wider quoted size, slower price changes, and clear reactions to overnight news. Be aware that there is only one market per day, so a year of history is roughly 365 samples.
What moves ETH 24h Up/Down
- Staking and ETF-flow headlines that change how much supply is liquid
- DeFi stress, because ETH collateral gets liquidated when lending markets de-risk
- Window structure: news that lands overnight in Asia or ahead of the US session, which re-prices a market that has many hours left
Schema
ETH Up/Down 24h fields and sample rows
The same columns are returned by the API and in Parquet and CSV files.
| Field | Type | Description |
|---|---|---|
| ts_exchange | string | Exchange timestamp (ISO-8601, ms) |
| ts_recv | string | AymarData receive timestamp |
| market | string | Window slug: <family>-<window start unix> |
| outcome | string | "up" or "down" token |
| event_type | string | last_trade_price | price_change | book |
| side | string | "buy" | "sell" for trades, "bid" | "ask" for book events |
| price | number | Probability price, 0–1 |
| size | number | Shares traded or resting size at the level |
Sample rows
| ts_exchange | ts_recv | market | outcome | event_type | side | price | size |
|---|---|---|---|---|---|---|---|
| 2026-10-23T08:53:47.860Z | 2026-10-23T08:53:47.906Z | eth-updown-24h-1792684800 | up | last_trade_price | buy | 0.47 | 284 |
| 2026-10-23T08:53:48.170Z | 2026-10-23T08:53:48.217Z | eth-updown-24h-1792684800 | down | price_change | ask | 0.54 | 7687 |
| 2026-10-23T08:53:48.261Z | 2026-10-23T08:53:48.318Z | eth-updown-24h-1792684800 | up | last_trade_price | sell | 0.46 | 111 |
Illustrative rows for eth-updown-24h. Market is the window slug (eth-updown-24h-<start unix>); prices are probabilities between 0 and 1.
Code
Pull ETH Up/Down 24h in Python, cURL or MCP
Market id: eth-updown-24h. Export AYMARDATA_API_KEY from your dashboard, then run the Python requests example.
import os
import requests
API = "https://api.aymardata.com/v1"
KEY = os.environ["AYMARDATA_API_KEY"] # export AYMARDATA_API_KEY=ad_live_…
H = {"Authorization": f"Bearer {KEY}", "User-Agent": "aymardata-docs/1.0"}
# ETH Up/Down 24h: every trade in one daily window
trades = requests.get(
f"{API}/trades",
headers=H,
params={
"source": "polymarket",
"market": "eth-updown-24h",
"outcome": "up",
"start": "2026-10-22T16:00:00Z",
"end": "2026-10-23T16:00:00Z",
"limit": 500,
},
timeout=30,
).json()["data"]
print(len(trades), trades[0]["price"], trades[-1]["price"])
book = requests.get(
f"{API}/book",
headers=H,
params={
"source": "polymarket",
"market": "eth-updown-24h",
"outcome": "up",
"at": "2026-10-22T22:00:00Z",
"depth": 10,
},
timeout=30,
).json()
print(book.get("spread"), len(trades))FAQ
ETH Up/Down 24h: common questions
When does the daily ETH Up/Down market open and resolve?
Daily eth-updown-24h markets open around midday New York time and resolve 24 hours later. Check each market's rules text for the exact reference price and time before building a settlement model on top of it.
How much ETH 24h history is there?
One market per day since 2025-06-01 — roughly 512 markets. Because each stays open for a day, the order-book history per market is much larger than for the short windows.
What moves the ETH 24h Up/Down price most?
Two things dominate. First, staking and ETF-flow headlines that change how much supply is liquid. Second, DeFi stress, because ETH collateral gets liquidated when lending markets de-risk. On top of that sits the structural driver of every daily window: news that lands overnight in Asia or ahead of the US session, which re-prices a market that has many hours left. Liquidity here is second only to BTC, with spreads a tick or two wider and more variance in resting size.
How does ETH 24h Up/Down compare with the ETHUSDT order book on Binance?
Binance is where price discovery happens; Polymarket prices a probability on top of it. Joining eth-updown-24h with Binance ETHUSDT spot and perp ticks on timestamp lets you measure how many milliseconds the Up price lags a spot move. See the Binance ETH spot and perp pages for the matching feeds.
How big is the eth-updown-24h dataset?
About 6.19M events recorded since 2025-06-01, or roughly 12,088 events a day across about 512 windows. Every event carries both exchange and receive timestamps.
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Binance spot: ETHUSDT spot
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On-chain perpetual
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Kalshi contracts on the same asset
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