As far as "diagonal lines" or trendlines, they really don't have anything to do with incorporating time. They're there. Time is not an issue.
As to your items one through seven, 2-6 are not incorporated into this particular ORB strategy. One begins by determining the opening range, then he enters the breakout, then he either exits before the day's target is reached if conditions (as he defines them) warrant, or he exits at the target. And that's it. Gaps and reversals are not part of the strategy. One can trade them, but one can also take the money off the ORB trade and quit.
Trading gaps is not especially difficult, but it's not as simple as the above. But, in any case, it is a separate issue and doesn't have anything to do with the ORB strategy.
Trading reversals is also an option. However, reversals are considerably more complicated than what is required by the ORB strategy. They can be made simpler by making choices, but they are not inherently simple. Therefore, they are not included in the ORB strategy either.
As to your chart and what makes one reaction more important than another, keeping it simple entails avoiding the issue of "importance". I look at higher/lower and little else. I also don't work the day to death.
Your chart begins with a move downward, a reaction, and a downward break through the opening range. It then makes a low. It then makes a lower low and reaches the target. For most people trading this strategy, that's the end of their day. If, however, you choose to have a wide stop or are hoping for a range expansion, you might choose to stay in.
If you exit and trade the reversal, the double bottom is a legitimate trade. Whether you buy the inside low or buy a breakout of the RH is up to you since trading reversals are not part of the ORB strategy. If you had bought the breakout of the RH, you would have been SO quickly.
But that would have been that. When you start trading reversals of reversals, much less reversals of reversals of reversals, then you're almost guaranteed to be trading chop. It's not necessary to know what kind of day you're going to have. The task is to decide what sort of day you're having, i.e., understanding what's in front of you in real time.
As for your last three questions, if the first one is directed toward entering on retracements, that's what I'm doing now due to the low volume breakouts, but that's my choice; retracements are not part of the ORB strategy. As to the second, volume is not a consideration in the ORB strategy. As to the third, range contraction does lead to wide-range days, but the idea that you can count the number of days leading up to a WR day is largely nonsense. And, again, it's not a part of the ORB strategy.
The ORB strategy is extremely simple. One can massage it until it is almost entirely discretionary and thus considerably more complex and complicated, but then there's little point in developing the strategy in the first place. The strategy is for getting in, getting out, and doing something more productive with the rest of your day. It's not about scalping or trading chop or squeezing out every available point.
What I personally am doing on any given day is largely irrelevant. This thread is not my journal. It's about simple ways of trading futures. The ORB strategy is only one of those ways and I'm happy to answer questions about it if I can do so. However, I have no interest in maintaining a journal. Anyone who's interested for some reason in what I'm doing is welcome to join me in the chat room if I happen to be there.
--Db