Here is AudUsd H1 from last April. You can see the same pattern over and over again. A contraction of the rainbow followed by and outward expansion, The Contraction and Expansion is usually marked by a Semaphor and very often coincides with a crossover (Zero Level) on the Slope Indicator. It is really pretty predictable once you get to know the Rainbows for each pair.
Observation is the path to discovery.