It could be that he's right on all of it and I'm wrong
It's never wrong to sell at a profit:
The reason I disagree with this, is you could end up selling all your winners early, and then you won't make enough profit to outweigh your losing trades. You need to WIN when you win, because there's a good chance you will lose when you lose. Of course, don't hole
Always hedge your positions:
I think what he means is, have some longs and some shorts, and that applies even when you think the market is going one way or the other. Now, it is possible that some stocks will go one way when the overall market goes the opposite way, and you can still make money on everything. I think that as long as you are not all in, you are hedged. It doesn't matter if you make a bad trade and a good trade on the same day, or if you make them on different days. You are equally hedged. Take this week, The timing array says stocks should hit a low this week, so why be long anything?
Take a small initial position and add to it if it goes your way:
This might work out in reality, but on paper the stock could go against you after the second trade as easily as it could the first trade. Extra work, extra commission cost, extra reporting issues. I just don't see the point.