This article looks at the performance of the overnight session when the S&P 500 opens at a 5-day low but at the same time, the close is higher than the open.
Here is the testable trading strategy in plain English:
SPY must open at a 5 day low.
The close must be higher than the open.
If 1 and 2 are true, then enter on the close.
Exit tomorrow’s open.
The profit curve is shown below.
You can find more info about this trading strategy here:
https://www.quantifiedstrategies.com/5-day-low-overnight-trading-strategy/