Ok, I can't believe I actually put in the work to do this, but here is a quantitative study. You will probably notice that I'm not nearly as adept as most people here given my rudimentary methodology, but I believe its accurate, and would replicate exactly what a trader would do in order to actually trade this method.
I took the charts that I posted earlier, exported the data, and added the totals in Excel. Once again, this is how the bars are drawn (for the one guy who didn't get it). The open of the bar happens at 16:14:59. Lets assume that you enter the market on the ES at this time and get a fill just before the market closes. This would be the open price of the bar. The close price is at 09:29:59, just before the RTH market opens. Then its a simple calculation of open minus close to arrive at the total made or lost for that day.
I am presenting 2 charts. First is from the end of September just before the drop.
There are 170 days, and the total comes to 153 points. So now the caveats. The price that we get for open and close might not be the price we get because of the bid/ask spread. We should therefore assume a tick extra for both the open and close. Also, commissions will be about 1/3 of a tick (ie. $4 cost to trade, which is 1/3 of the $12.50 you get from 1 tick profit).
So putting it all together, we have 153 points over 170 days, hence 0.9 points profit per day. Now we subtract 0.5 points for realistic fills taking into account the bid/ask spread, and we get a profit of 0.4 points average per day. Then we lose 1/3 tick for commissions, so our net is 0.32. This means over 170 days, we make 54 points, which comes out to $2,700. This sounds like a good number for minimal work, but 0.32 points per day is pretty shitty.
Lets look at the data going back to 2013.
Here we see a total of 759 points over 1692 days, which works out to 0.45 points per day. Once we subtract losing a tick on entry and exit, we are already negative.
I have no idea how any of those other studies calculate the data that makes this strategy sound awesome, but based on what I would do as a trader to replicate this, its a pretty shitty strategy based on the hard numbers from trading the ES. Maybe one could introduce hard stops on certain outliers like being down 20 points, or one could enter just before 16:00 as opposed to just before 16:15, but I doubt any of this would matter much.