//+------------------------------------------------------------------+ //| ROC.mq5 | //| Copyright 2009, MetaQuotes Software Corp. | //| http://www.mql5.com | //+------------------------------------------------------------------+ #property copyright "2009, MetaQuotes Software Corp." #property link "http://www.mql5.com" #property description "Rate of Change" //--- indicator settings #property indicator_separate_window #property indicator_buffers 1 #property indicator_plots 1 #property indicator_type1 DRAW_LINE #property indicator_color1 LightSeaGreen //--- input parameters input int InpRocPeriod=12; // Period //--- indicator buffers double ExtRocBuffer[]; //--- global variable int ExtRocPeriod; //+------------------------------------------------------------------+ //| Rate of Change initialization function | //+------------------------------------------------------------------+ void OnInit() { //--- check for input if(InpRocPeriod<1) { ExtRocPeriod=12; Print("Incorrect value for input variable InpRocPeriod =",InpRocPeriod, "Indicator will use value =",ExtRocPeriod,"for calculations."); } else ExtRocPeriod=InpRocPeriod; //--- indicator buffers mapping SetIndexBuffer(0,ExtRocBuffer,INDICATOR_DATA); //--- set accuracy IndicatorSetInteger(INDICATOR_DIGITS,2); //--- name for DataWindow and indicator subwindow label IndicatorSetString(INDICATOR_SHORTNAME,"ROC("+string(ExtRocPeriod)+")"); //--- sets first bar from what index will be drawn PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,ExtRocPeriod); //--- initialization done } //+------------------------------------------------------------------+ //| Rate of Change | //+------------------------------------------------------------------+ int OnCalculate(const int rates_total,const int prev_calculated,const int begin,const double &price[]) { //--- check for rates count if(rates_total