I give no value to the random walk stuff. Just was asking about your lines. You seem to be experimenting.
Support and resistance, as seen on a graph can often be predicted and is useful. S/R is the fodder of so many other theories and books as well. The waters are so muddy though, a lot of traders don't even bother instead rely on indicators and oscillators.
On this chart we have, from my point of view, the most likely reversal zones. In the chart we see lines, but they should be interpreted as zones or areas.
I rarely use any indicators. Most of my charts show the RSI, but I only use it on some occasions.
This was indeed more of a experiment or a lesson to see how price reacts to the certain areas on the chart, just like this one on the EURUSD that I posted a few months ago: