Night-volume gate for opening range breakouts

Night-volume comes first

The specified workflow treats the regular session as a sequenced construction. Night-volume is the volume accumulated from midnight to 08:30 before the regular equity-index session. The first-hour-range is the high and low printed between 08:30 and 09:30 and later used as breakout levels. Those two measurements sit in front of the Opening range breakout.

Session analysis sets the clock

Session analysis splits the clock into a midnight to 08:30 night window, an 08:30 to 09:30 first-hour-range, a 09:30 to 15:15 main session, and a 15:15 to midnight late window.

At 08:30 CET, overnight volume is compared with a five-day moving average to form a volatility-bias. That comparison is the high- or low-range expectation for the session about to start.

Three volume and range relationships

On E-mini S&P 500 futures from 2011 to 2016, midnight-to-08:30 volume averaged about 13% of the full session, with an 8% standard deviation, so the overnight share typically sat between 5% and 21%.

Three ordinary-least-squares fits each had a positive slope and an R-squared above 0.25: overnight volume versus daily volume, daily volume versus daily range, and overnight volume versus daily range. The overnight-versus-daily-volume fit was the strongest, with an R-squared about 0.56. Daily volume versus daily range was next, at about 0.44. Overnight volume still had a weaker but positive link to the coming day's range, at about 0.27.

When the first-hour-range may be traded

When overnight volume is below that five-day average, the first-hour breakout is withheld for the day. When it is above, a buy stop sits above the first-hour high and a sell stop sits below the first-hour low.

The coded procedure records the first-hour high and low between 08:30 and 09:30. From 09:45 until 15:00 it buys a close above that high or sells short a close below that low only if night-volume exceeds an adjustable multiple of the recent night-volume average. That multiple is the Volume confirmation gate.

Open positions are flattened at 15:15, so the holding period is the remainder of the regular session after the filtered Opening range breakout signal.

The same construction on four contracts

The same construction was specified for four U.S. equity-index futures: ES, YM, NQ, and TF. Each pairing compared an unfiltered first-hour breakout with a night-volume-gated version. On the Russell contract the volume-ratio gate was swept from 1.0 to 2.0 in 0.1 increments as a construction robustness check.