A common formation used among technicians is the swing measurement. It is very simple to calculate and project on a chart. This formation is simply using the length of one move (usually the most recent one) to determine the length of the next move, after a correction has taken place. These are difficult to use with accuracy since it is rare that swings will be exactly the same length, but this technique can be effective in some markets and has its place as a technical trading tool.

In September Chicago Wheat for example, the first leg down indicated by 'A' helps project the length of the next move 'B'