RTH vs ETH (Regular vs Extended Trading Hours)
The split between the high-volume day session aligned with US cash markets (RTH) and the thinner overnight session (ETH) — two auctions with different rules of behavior.
What is RTH vs ETH (Regular vs Extended Trading Hours)?
RTH vs ETH splits the nearly-24-hour futures session into its two personalities. Regular Trading Hours align with the US cash market and carry the volume, the institutions, and the cleanest technical behavior. Extended (overnight) hours carry the headlines, the gaps-in-motion, and the thin books where slippage lives.
How RTH vs ETH (Regular vs Extended Trading Hours) works
Charting platforms let you toggle ETH data on or off — and the choice changes every indicator: VWAP, profile levels, and moving averages all differ between RTH-only and full-session charts. The standard playbook treats overnight extremes (ONH/ONL) and the prior RTH range as the reference levels for the next day session’s opening auction.
Worked example
NQ rallies 80 points overnight on Asia-session news. At the 9:30 open, RTH volume arrives and immediately tests whether overnight prices find acceptance — the classic “overnight inventory correction.” Traders who marked the ONH/ONL had their first two levels of the day before the cash market ever opened.
RTH vs ETH (Regular vs Extended Trading Hours) vs related concepts
Side-by-side comparison of RTH vs ETH (Regular vs Extended Trading Hours) against the most commonly confused alternatives.
| Concept | Definition | Category |
|---|---|---|
| RTH vs ETH (Regular vs Extended Trading Hours) this term | The split between the high-volume day session aligned with US cash markets (RTH) and the thinner overnight session (ETH) — two auctions with different rules of behavior. | Futures Mechanics |
| CME Globex | CME's electronic trading platform — the venue where futures actually trade nearly 24 hours a day, Sunday evening through Friday close. | Futures Mechanics |
| Trading Hours | The defined daily windows during which a futures contract is open for trading on the exchange — typically split into Regular Trading Hours (RTH) and Extended/Globex sessions covering near-24-hour cycles. | Futures Mechanics |
| VWAP (Volume-Weighted Average Price) | The average price of a session weighted by volume — the institutional benchmark for fair value and one of the most-watched intraday levels in index futures. | Strategies |
Why traders fail RTH vs ETH (Regular vs Extended Trading Hours)
Applying RTH assumptions to ETH liquidity — the same 5-contract order that fills cleanly at 10 AM can slip meaningfully at 2 AM. Mixing chart contexts unknowingly: an RTH-only VWAP and a full-session VWAP are different lines; know which one your platform is drawing before you lean on it.
Frequently asked questions about RTH vs ETH (Regular vs Extended Trading Hours)
What are RTH and ETH in futures?
RTH (Regular Trading Hours) is the day session aligned with US cash markets — 9:30 AM to 4:15 PM ET for index futures. ETH (Extended Trading Hours) is the rest of the nearly-24-hour Globex session.
Should my charts include the overnight session?
Both views have value: full-session charts show overnight levels (ONH/ONL); RTH-only charts show cleaner volume-based levels. Many futures traders keep one of each — the mistake is not knowing which you're reading.