Here are some lines like I draw. These are what I term reversal lines. They are essentially short term lines anywhere from 1/4 of a session to 2-3 days (if you get follow-through the next trading day).
They usually change DAILY for the most part. That is there is often a trend change day to day during regular trading hours. Hence the close on the high or low of the day and the next session reverses as sentiment, profit taking, buying, news, or other "events" are factored into the market.
I use these "eyeballed" delineations as trendlines to help my mind get around a change in sentiment and give me a sense of direction.
I trade directionally but only in the direction which I feel the market has momentum. This works for me at least with day trading.
Perhaps this is all bullshit and there are many e.g. "Fooled by Randomness" and "(Mis)behavior of Markets" that say the human mind grasps for structure and patterns where they don't exist. But I believe they exist and hope to profit off these patterns.