Quote from topherea:
From my current experience, smart bombs many times are located in paths that are unknown and many times at mid points between boundaries as the HFs like to gather in mid points. I always do my best to make sure that I am familiar with my surroundings prior to walking down the path and never jump on the midpoint of a path through a shortcut. If it is something I am not familiar with and haven't done repeatedly, I am in unknown territory thus, vulnerable to attack by those who are familiar with that zone.
To address 'time' on the map, the candlestick or bar draws additional volatile zones in time fragments which are important to pay attention to, as they can give an early signal to a change in direction, or, many times a place to enter or exit the path outside of the mid point. BUT the line (or close) map reduces the extra noise/smartbombs and gives a more precise path thus giving the LFs a tighter range to draw their lines, and travel.