I am not padutrader but I am an afficionado of Brooks and base some of my trade ideas off his many ways of trading the markets. I will answer the question you posed, from my viewpoint on the matter. For me, constant evaluation is a given. I consider it as “managing the trade.” I have setups that give me signals as to when to enter and they are based upon patterns and PA contexts; immediate and the larger context. That I might say is “static.” That is, it is a given beforehand. Like an H1 or L2 setup to name two.Why do you need to evaluate a trade on a constant basis. Why not just choose a target and stop? Don't you think if you are constantly getting stopped out, your stop is too close to your entry? Don't you think once you are in a trade, you are less rational and therefore it's better to have automated your stops and targets?
What part of his book says you must constantly evaluate your trade?
Apart from the static is the dynamic. For me, that involves not just that price “did” something (made a pattern and setup) but also “how” it did it. And “how” it does whatever it does AFTER my entry. So, taken together, the static and dynamic, give me “live” feedback as to how I should manage my trade. I will often adjust SL’s AND PT ‘s as price unfolds after my entry. Since I cannot know “how” price will be made beforehand I have to watch it live after my entry to make any adjustments. Like especially in PT’s. I have an initial PT but “how” price moves as it is moving towards that PT is important info to myself to determine if I should adjust my PT for less profit or for more profit. And as concerns SL’s same thing. Volatility can increase on a dime (and no person can predict when it will do so) and therefore, I may have to widen my SL. I do have a “give up” point where no further adjustment will be made. If after entry price immediately moves in my favor then my actual SL is less than my initial SL and if it is a strong BO that I happened to catch I will adjust my SL to the nearest swing high or swing low that is a major, not a minor, swing high/low depending if the BO is a bull or bear move, in my favor.
This said there are times I cannot watch a trade. In such a case I will have a SL and PT set and in place usually accomplished by using bracket orders upon entry and adjusting them to fit the probability of price reaching my profit target before it hits my SL. Then I walk away to do whatever it is I have to do.