Its obvious the program made $400/day so its there to be made. Its not easy, only in theory or without the human emotion side of the equation. The typical range of the ER mini is 10 points/day, except in consolidation after a large move.
I've read about bond traders on the floor who knock out 10 points/day, or $320 every day to make $70K or more per year just like laying bricks, same method daily.
I think one point in er mini is just noise and you have to hold on to a target...maybe just 2 or 3 to 1. If you can't make more than one point on one contract on a daily average, you likely should not be trading multiple contracts.