I have been trading my ORB system successfully for a couple of years. It gives just one trade per day, and can be done over mobile phones without any charts. The only problem with the ORB system is the whipsaws. I have had whipsaws that lasted 2 months - every day a loss, except for 4-5 days of profit in between.
Due to this background - I prefer systems that have an early entry, no add (full positions initially), far Stop Losses, and no profit booking. In the ORB system, what I found is that it is best to set in early, and get out late, with far Stop Losses.
So I am not very comfortable with what I am doing now. But then I was not comfortable with the ORB system also initially.