Wouldn't "patience" be the theme of the week so far given our proximity to the Daily/Weekly means...?
Your first post, I see. Well, as Gringo says, it depends on one's choice. Or choices. Since we are as you point out in the middle, there are and have been a lot of dramatic moves back and forth, often ending up where they started. These won't go on forever, but they can go on for quite a while (just review the actions in the middle over the past year or so). AMT isn't going to be of much help in these situations, except insofar as it forewarns the trader that trading in the middle is not going to be a breeze.
A daytrader, however, isn't going to want to wait until price gets to the upper or lower limit of the trend channel before doing anything. But he does have the SLA to lean on. As long as he's not obsessed with jumping on anything that moves, the SLA can be enough to steer him in the right direction and keep him there. That is, after all, what it's for.
This morning, for example, even though we were hovering around the middle of the weekly trend channel, again, the failure of the NQ at the overnight high was noteworthy, not because it's a "set-up" but because of the fact of the failure itself. Whether or not a trade like this is worth taking depends in large part on how afraid the trader is of taking it. As for the exit, same old same old: a break of the supply line.
As to one who trades a much longer interval, there are choices to be made here as well. Does one want to exit when he reaches this middle, or does he want to hold on and wait for movement to the opposite side? What if price reverses at the middle and works its way all the way back to the original entry? Those who have spent any time at all with the SLA and how it's applied to exits will have learned that a re-entry strategy is essential. AMT is, after all, theoretical.