io:DRAMother / unreviewed · growth mode on · 25× max
Over 21 days of 20-level order-book snapshots, io:DRAM quoted a median spread of 3.79 bps in US regular hours with $84k resting within 25 bps of mid. A $25k market order paid about 8.97 bps in regular hours and 20.69 bps on weekends, when depth within 25 bps fell to $37k. Taker fee is 0.90 bps with growth mode on; funding averaged +15.44% annualised over the last 30 days.
order book replay48 snapshots · 2026-10-08 12:50 → 16:50 UTC · DRAM.json
depth = USD resting within ±25 bps of mid · slip = $25k market order through the book, avg fill vs mid, buy/sell mean · med = this market's median in the snapshot's session
order book replay: no recent order book snapshots
by sessionNew York time · medians over 21 days
| session | snaps | spread | p90 | top | depth ±10 | depth ±25 | depth ±50 | $5k | $25k | $100k | $100k fills | $250k fills |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| US regular 9:30–16:00 | 947 | 3.79 | 9.95 | $84k | 8.97 | 23.24 | 32% | 17% | ||||
| US extended 4–9:30, 16–20 | 1,418 | 3.44 | 8.26 | $77k | 9.46 | 23.33 | 25% | 11% | ||||
| Overnight 20–4 | 940 | 3.42 | 8.06 | $70k | 9.48 | 20.78 | 12% | 6% | ||||
| Weekend / holiday | 1,592 | 5.11 | 12.47 | $37k | 20.69 | 54.98 | 42% | 27% |
bps unless stated RTH 9:30–16:00 extended 4:00–9:30 and 16:00–20:00 overnight 20:00–4:00 on weekdays weekend runs Friday 20:00 to Monday 4:00 and includes NYSE holidays slip = mean of the buy and sell side of a market order walking the visible 20 levels fills = share of snapshots the size fits inside those levels "—" = not fillable in the median snapshot
slippage curve
hour of week
weekly · spread
weekly · depth ±25 bps
per round trip = 2 × median slippage + 2 × taker fee funding uses the 30-day mean hourly rate, annualised, charged for a position held all day slippage between tested sizes is interpolated on a log scale ignores maker rebates, impact that persists after your fill, and fee tiers
history6 market changes to io:DRAM observed in the changelog · newest first
- 2026-09-17 15:28listedannounced → tradingtrading enabled, announced 2026-09-13 · OI cap $5M · 25× max · growth mode on · marginTableId 25 · szDecimals 2 · fundingMultiplier 0.5
- 2026-09-17 14:28growth modedisabled → enabledgrowthMode observed changing from disabled to enabled
- 2026-09-17 14:28margin table20 → 25marginTableId observed changing from 20 to 25
- 2026-09-17 14:28max leverage20× ↑ 25×maxLeverage observed changing from 20 to 25
- 2026-09-17 14:28OI cap— → $5.0MoiCap observed changing from unknown to $5M
- 2026-09-13 07:28announced— → announcedmarket announced, trading not enabled
Plus 7 funding-parameter changes on 7 days, not listed here: show them in the changelog.
observed = first collector snapshot showing the new value, UTC; the change happened between the previous snapshot and that one announced = the market appeared with trading disabled; listed = trading enabled; trading halt = off and back within 48 h, before → after = mark either side full changelog atom feed
4,897 snapshots · 2026-09-17 15:28 → 2026-10-08 16:20 UTC (21.0 days) · size decimals 2 · raw: /api/io/DRAM.json · method and caveats: methodology