I have already experimented with changing the line: extern int ADXPeriod=14;...... As you probably already know, the ADX indicator is comprised of 3 lines; the main ADX line, as well as two other lines (DI+ and DI-). It turns out that changing 14 to another period only alters the period of the main ADX Line... I am trying to change the periods of the two other lines plotted on the ADX indicator (the DI+ and DI-)... It is not possible to do this in the indicators properties window in the trading terminal... where in the above MQL4 Code might I be able to change the periods of the DI+ and DI-?