It is a non-winnable strategy and does not work. It cannot. It if did, there would be thousands of funds utilizing this strategy. It is total fantasy, and an artifact of wishful thinking.
And how do you know funds are not utilizing this strategy?
I think I just showed that it is profitable - although there will be deep drawdowns...
...The real question is if it beats buy and hold over the same time period? I have a hunch it don't.
Do your research you will find 90% of all U.S. stock index gains are from the overnight futures session. Its not that hard folks. But I understand if your scared.