//+------------------------------------------------------------------+ //| ExMass.mq4 | //| Copyright © 2006, Alex Sidd (Executer) | //| http://www.metaquotes.net/ | //+------------------------------------------------------------------+ #property copyright "Copyright © 2006, Alex Sidd (Executer)" #property link "mailto:work_st@mail.ru" //--- indicator version #property version "1.00" //--- drawing the indicator in a separate window #property indicator_separate_window //--- number of indicator buffers is 1 #property indicator_buffers 1 //--- one plot is used #property indicator_plots 1 //+-----------------------------------+ //| Parameters of indicator drawing | //+-----------------------------------+ //--- drawing the indicator as a line #property indicator_type1 DRAW_LINE //--- SlateBlue color is used as the color of the indicator line #property indicator_color1 clrSlateBlue //--- the indicator line is a continuous curve #property indicator_style1 STYLE_SOLID //--- indicator line width is 1 #property indicator_width1 1 //--- displaying the indicator label #property indicator_label1 "ExMass" //+-----------------------------------+ //| declaration of constants | //+-----------------------------------+ #define RESET 0 // The constant for returning the indicator recalculation command to the terminal //+-----------------------------------+ //| Indicator input parameters | //+-----------------------------------+ input uint ExPeriod=8; // Period //+-----------------------------------+ //--- declaration of dynamic arrays that will be used as indicator buffers double ExtBuffer[]; //--- declaration of integer variables of data starting point int min_rates_total; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int OnInit() { //--- initialization of variables of the start of data calculation min_rates_total=int(ExPeriod); //--- set dynamic array as an indicator buffer SetIndexBuffer(0,ExtBuffer,INDICATOR_DATA); //--- indexing elements in the buffer as in timeseries ArraySetAsSeries(ExtBuffer,true); //--- shift the beginning of indicator drawing PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,min_rates_total); //--- setting the indicator values that won't be visible on a chart PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,EMPTY_VALUE); //--- creation of the name to be displayed in a separate sub-window and in a pop up help IndicatorSetString(INDICATOR_SHORTNAME,"ExMass"); //--- determining the accuracy of the indicator values IndicatorSetInteger(INDICATOR_DIGITS,0); //--- initialization end return(INIT_SUCCEEDED); } //+------------------------------------------------------------------+ //| Custom indicator iteration function | //+------------------------------------------------------------------+ int OnCalculate(const int rates_total, // number of bars in history at the current tick const int prev_calculated,// amount of history in bars at the previous tick const datetime &time[], const double &open[], const double &high[], const double &low[], const double &close[], const long &tick_volume[], const long &volume[], const int &spread[]) { //--- checking if the number of bars is enough for the calculation if(rates_totalrates_total || prev_calculated<=0)// checking for the first start of calculation of an indicator { limit=rates_total-min_rates_total-1; // starting index for the calculation of all bars } else limit=rates_total-prev_calculated; // starting index for the calculation of new bars //--- the first indicator calculation loop for(bar=limit; bar>=0 && !IsStopped(); bar--) { double positive=high[ArrayMaximum(high,bar,ExPeriod)]; double negative=low[ArrayMinimum(low,bar,ExPeriod)]; ExtBuffer[bar]=(positive-negative)/_Point; } //--- return(rates_total); } //+------------------------------------------------------------------+