//+------------------------------------------------------------------+
//|                                                  MAPlusMinus.mq4 |
//|                                                      John Taylor |
//|                          http://www.linkedin.com/in/johntaylorhk |
//+------------------------------------------------------------------+
#property copyright "John Taylor"
#property link      "http://www.linkedin.com/in/johntaylorhk"

#property  indicator_chart_window
#property  indicator_buffers 3
#property  indicator_color1  Lime
#property  indicator_color2  Red
#property  indicator_color3  Magenta
#property  indicator_width1  1
#property  indicator_width2  1
#property  indicator_width3  1

extern int E_Period    =12;
extern int E_PlusPts   = 5;
extern int E_MinusPts  = 5;
/*
MODE_SMA 0 Simple moving average, 
MODE_EMA 1 Exponential moving average, 
MODE_SMMA 2 Smoothed moving average, 
MODE_LWMA 3 Linear weighted moving average 
*/
extern int E_MaType    = MODE_SMA;
/*
PRICE_CLOSE 0 Close price. 
PRICE_OPEN 1 Open price. 
PRICE_HIGH 2 High price. 
PRICE_LOW 3 Low price. 
PRICE_MEDIAN 4 Median price, (high+low)/2. 
PRICE_TYPICAL 5 Typical price, (high+low+close)/3. 
PRICE_WEIGHTED 6 Weighted close price, (high+low+close+close)/4. 
*/
extern int E_PriceType = PRICE_CLOSE; //

double ma[];
double plus[];
double minus[];

double   myPoint; // Robert added for better handling of 4 and 5 digit brokers

int init() {
   IndicatorShortName(StringConcatenate("MAPlusMinus(+",E_PlusPts,"/-",E_MinusPts,")"));

   SetIndexBuffer(0,plus);
   SetIndexStyle (0,DRAW_LINE,STYLE_SOLID,1,Lime);
   SetIndexLabel (0,"Upper");

   SetIndexBuffer(1,minus);
   SetIndexStyle (1,DRAW_LINE,STYLE_SOLID,1,Red);
   SetIndexLabel (1,"Lower");

   SetIndexBuffer(2,ma);
   SetIndexStyle (2,DRAW_LINE,STYLE_SOLID,1,Magenta);
   SetIndexLabel (2,"Middle");
   
   SetIndexDrawBegin(0,E_Period-1);
   SetIndexDrawBegin(1,E_Period-1);
   SetIndexDrawBegin(2,E_Period-1);

   myPoint = SetPoint();

   return(0);
}

int deinit() {

   return(0);
}

int start() {
   if (Bars<E_Period) return(0); // Not enough bars
   int limit = Bars-IndicatorCounted()-1;
   
   for(int shift=limit;shift>=0;shift--) {
      ma[shift]=iMA(NULL,0,E_Period,0,E_MaType,E_PriceType,shift);
      plus[shift]=ma[shift]+E_PlusPts*myPoint; // Modified Point to myPoint for 5 digit brokers
      minus[shift]=ma[shift]-E_PlusPts*myPoint;
   }

   return(0);
}

double SetPoint()
{
   double mPoint;
   
   if (Digits < 4)
      mPoint = 0.01;
   else
      mPoint = 0.0001;
   
   return(mPoint);
}