Quote from riskfreetrading:
Maestro:
You ask a very interesting question. The reason of my decision/call is a procedure/numbers, but I tend sometimes(most of the time) to go ahead of those numbers/formula. I always ask myself if I would not be better off to just give it to someone else who would follow it on my behalf. In the case of today, based on the formula I knew that at around 10:10AM, the market would have to fall or lie. It cannot invalid some mathematical description. The numbers told me it would not be an up day, but I was a bit worried to miss an early down move. That is why I entered some of my position earlier than 10:10AM.
I have now to restudy the market, to see whether it can go the other way from this point forward. So, I am going to relook at the numbers to make a decision. The market has more degrees of freedom, and my job is to find those times and prices when the degrees of freedom are at a minimum or none. I hope (and I think) that you would understand that I cannot go further. But you are right the psychology is also important.