ADX and + DI /-DI system is a standard indicator in Amibroker.
It is a good system and trades only in strong trends and remains out in sideways markets.... It has following disadvantages :
1) Signals come late so we will have to fergo the initial portion and last portion of a trend.
2) Signals sometime come when the trend is about to end.
So if we are the types who want to catch each turn of the market, then this may not be a good system for us.
Smart_trade