This can be used to compliment the Directional Movement Index if used as a standalone trading system. In addition to using the ADX and DI lines, a trailing stop can be used when the DI lines cross. If the plus line is above to show a buy signal, then the low of the price of when which the cross took place is used as a trailing stop. If the minus line is above to show a sell signal, then the high of the price of when which the cross took place is used as a trailing stop. This helps cut losses sooner whenever the price would end up going through these trailing stops or support/resistance levels yet the DMI system would show an upward or downward move.