Definition Directional Movement (DMI) is actually a collection of three separate indicators combined into one. Directional Movement consists of the Average Directional Index (ADX), Plus Directional Indicator (+DI) and Minus Directional Indicator (-DI). ADX's purposes is to define whether or not there is a trend present. It does not take direction into account at all. The other two indicators (+DI and -DI) are used to compliment the ADX. They serve the purpose of determining trend directi...