TREND LINES, TOP LINES, BOTTOM LINES, HORIZONTAL LINES

Yellow highlights shows examples where it broke the line and then reversed.
Green checks identify breaking the line and continuing to the next line.

Current price is at a level where it can either fall below the trend-line to the next anticipated support line
or continue up to the top line.

If it breaks the top-line and holds above it, all those horizontal lines which were drawn from price action,
are future targets

Horizontal lines capture the ebb and flow of regular price action over the course of several days on USD/JPY.
The diagonal line keeps track of a top-line as price is falling.
Note how price sometimes continues and sometimes reverses when it breaks through a line. Be ready for either!
Anticipate the next move.

1. You can draw the line but price doesn't necessarily respect it.
2. When price breaks through a support/resistance line or any other kind of trend-line, there is no guarantee it will keep on going.

Project the ascending top-line of a working trend.
Track the high, low and middle of a working range.
Identify important price levels that are being protected for periods of time.
Create divergence giving a foreshadowing of reversals in price action.
Identify pivotal points based on averages from the previous period, (day, week, month, etc).
A line drawn at the level of a spike in price keeps track of outlier markers for future reference from random* flares in volatility.
A line can help you see where the day's trading took place -- Near the highs, lows or right in the middle of the daily range.

Just as often, when price breaks through a trend-line, it immediately reverses and goes right back from whence it came.

That is to say, when price breaks a trend-line be quick to take the reversals if it immediately fails to hold the new position over the line.