There's a set of basic rules that go along with the fib boxes that helps to determine which levels are more relevant for reversals. SimpleGreen mentioned these at the beginning and I find them to be very true.
For example, once price action breaks into a second box, either above or below the main box, expectations are that price action will move all the way to the furthest trade level in the 2nd box, finding temporary stopping points at the first trade level and the 50% box along the way.
Also, when price action reaches the full 100% level in the second box, chances of a pullback are pretty high. That would be the equivalent of a 200% run which is why we have the -2 setting in the fib box parameters for the lower box. That's where the 3 boxes come from...100% swings to either side.
Once a breakout occurs above or below the next box, then you can simply redraw the fibs to compensate and be good to go again for several more days or even weeks since breakouts on the larger time frames don't occur often.
