A component of the average directional index that is used to measure the presence of an uptrend. When the +DI is sloping upward, it is a signal that the uptrend is getting stronger. This indicator is nearly always plotted along with the negative directional indicator. Many technical traders will watch for the positive directional indicator to cross above the negative directional indicator to signal the beginning of an uptrend. The +DI is a key factor in the calculation of the popular average directional index.