Everyone has their "indicators" as to when to trade and when not to trade. If someone felt that Fridays' price action was not tradeable for them, then for whatever their reason, they just should not trade.
I have very strict rules about when not to trade. Some are just a matter of time periods (for example, I will generally not trade between 11:30 and 1:30) and I have cetain specific things I look at (volume, divergent markets, some of my secret stuff, etc.) For a good part of the day Friday, I just watched. For a good part of the day Friday I got away from my screens completely...as I often do anyway in the middle of the day.
I ended up having an exceptionally good day (for me....over 60k), but it was virtually all in the last hour (as it so often is).
So once again, it comes down to discipline. I feel strongly, as I am sure most of us do, that you need to be patient and let the market come to you. Let the stars line up so to speak. ONe of the worst things a trader can do, IMO, is to trade when they are not comfortable with the market action. This is right up there with letting a winner turn into a loser.
Maybe my next thread should be about HOW NOT TO TRADE

Or BIGGEST MISTAKES IN TRADING. If anyone has any specific topic they think would make a good thread, let's hear it. I am getting close to retiring from trading (working), so I might as well pass on what I know. (my 3 kids are about on their own. Oldest graduating college, second in her sophomore year and it's all paid for, and my youngest is in the Navy Nuclear Training Center. My house is paid for (almost), and my wife, who is an attorney has gotten tired of working and is ready to hit the beach too. I don't want to retire when I am too old to enjoy it. I am in my early 50's and it is my time.
I will never write a book (I have, but not on trading), and I will never do seminars. I have no desire to be under that kind of scrutiny nor do I want the attention. Nor do I need the money. But I have always taken pride in helping other traders. Sure, if every trader traded my way, it would no longer work. But there are too many players, and the playing field is far too large to ever have this kind of effect.
Good luck to all,
RS7