Rembert, this is perfectly in line with Levine's premise of looking for a psychological inflection point, which might be at an actual low, or the first big gap up, which might also be an IBD follow through day.
David Hawkins will adjust with some hindsight the launch date after the first pullback to the MIDAS curve vicinity, under the assumption that the next pullback will more closely respect the MIDAS curve.
Regarding the multiple support and resistance curves, they can easily clutter a chart. Once a support is broken, for instance, I leave it to see if it turns into resistance. However, if it looks like price is not respecting it, I simply remove it at that point.