For FX, the relayer sources executable quotes from institutional liquidity providers for market open sessions. Trading continues during most US holidays.
Instrument
Week Start (ET)
Week End (ET)
EUR / USD
Sunday 5:00 PM
Friday 5:00 PM
USD / JPY
Sunday 5:00 PM
Friday 5:00 PM
Internal Trading Sessions
Internal pricing is used from Friday 5:00 PM to Sunday 5:00 PM ET, or at any time there is a gap of more than 30 seconds between external oracle datapoints. This ensures continuous pricing coverage across all sessions, including after-hours. You can read more about the internal pricing mechanism here.