You're in a relationship and things are going great. You feel like you're on the same page, going at the same pace. Everything is perfect. But then, the other person moves faster ("Um...no, I don't want to marry you and have a million babies) and now you're no longer on the same page.
Time and prices markets have a relationship with each other: they feed off of each other. One affects the other. Really smart financial people use can geometry to predict the relationship between time and prices. If time and prices are really hitting it off and getting along, they move at the same pace. One day = one price point. This happy relationship gets messy when price or time moves faster. The use of angles help financial gurus see where this relationship is going in the future.
There are nine different types of Gann Angles in identifying trends. When one angle has a break-up, the next angle basically steps in, brings it ice cream, and adds support.