mql4-calc/knitpkg/include/douglasrechia/calc/Calc.mqh

//+------------------------------------------------------------------+
//|                                                       Calc.mqh   |
//|                                                                  |
//|                    Helix for MetaTrader — Demo                   |
//|                                                                  |
//|                          MIT License                             |
//|                    Copyright (c) 2025 Douglas Rechia             |
//|                                                                  |
//|  Common technical analysis functions built on knitpkg-mt4-bar.      |
//|  Provides lightweight implementations of SMA, ATR, and other     |
//|  indicators for use in Helix packages and MetaTrader projects.   |
//|                                                                  |
//|  DISCLAIMER:                                                     |
//|  This code is provided AS-IS for educational purposes only.      |
//|  No warranty is given. The author assumes no liability for any   |
//|  damages or legal consequences arising from its use.             |
//|                                                                  |
//+------------------------------------------------------------------+

//------------------------------------------------------------------
// Development autocomplete — resolves dependencies and enables
// MetaEditor IntelliSense; automatically neutralized by Helix 
// installer.
// Run `kp-mt autocomplete` to regenerate.
//------------------------------------------------------------------
#include "../../../autocomplete/autocomplete.mqh"


//------------------------------------------------------------------
// Helix include directives — used by Helix installer at the time 
// this package is installed as a dependency into another Helix 
// project.
//------------------------------------------------------------------
/* @knitpkg:include "douglasrechia/bar/TimeSeries.mqh" */
/* @knitpkg:include "douglasrechia/bar/Bar.mqh" */

//+------------------------------------------------------------------+
//| Simple Moving Average                                            |
//+------------------------------------------------------------------+
double SMA(ITimeSeries<double> &series, int period, int shift = 0)
  {
   if(series.Size() < (period + shift))
      return 0.0;

   double sum = 0.0;
   for(int i = shift; i < shift + period; i++)
      sum += series.ValueAtShift(i);

   return sum / period;
  }

//+------------------------------------------------------------------+
//| Average True Range                                               |
//+------------------------------------------------------------------+
double ATR(IBar &bar, int period, int shift = 0)
  {
   if(bar.Size() < (period + shift + 1))
      return 0.0;

   double sum = 0.0;
   for(int i = shift; i < shift + period; i++)
     {
      double tr = MathMax(bar.High(i) - bar.Low(i),
                          MathMax(MathAbs(bar.High(i) - bar.Close(i+1)),
                                  MathAbs(bar.Low(i)  - bar.Close(i+1))));
      sum += tr;
     }

   return sum / period;
  }
//+------------------------------------------------------------------+