Directional Movement Indicator (DMI) - Technical Analysis from A to Z
The Directional Movement System helps determine if a security is "trending". It was developed by Welles Wilder and
is explained in his book, "New Concepts in Technical Trading Systems". The basic Directional Movement trading
system involves comparing the 14-day +DI ("Directional Indicator") and the 14-day -DI. Wilder suggests buying
then the +DI rises above the -DI and selling when the +DI falls below the -DI.