自製指標 ：EMA Slope Long

自製指標 ：EMA Slope Long

用當天的 EMA 來減去前一天的 EMA

用來看某一條 EMA 的斜率

有趣的是 這個算法和 Pips_To_EMA 的圖表看起來差不多是完全一樣哦

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//+------------------------------------------------------------------+
//|                                                        Bulls.mq4 |
//|                      Copyright ?2005, MetaQuotes Software Corp. |
//|                                       http://www.metaquotes.net/ |
//+------------------------------------------------------------------+

#property copyright "Copyright ?2005, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net/"

#property indicator_separate_window
#property indicator_buffers 1
#property indicator_color1 Silver

//---- input parameters

extern int BullsPeriod=250;

//---- buffers

double BullsBuffer[];

double TempBuffer[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+

int init()
{
   string short_name;

   //---- 1 additional buffer used for counting.

   IndicatorBuffers(2);
   IndicatorDigits(Digits);

   //---- indicator line

   SetIndexStyle(0,DRAW_HISTOGRAM);
   SetIndexBuffer(0,BullsBuffer);
   SetIndexBuffer(1,TempBuffer);

   //---- name for DataWindow and indicator subwindow label

   short_name="EMA_Slope_Long("+BullsPeriod+")";
   IndicatorShortName(short_name);
   SetIndexLabel(0,short_name);

   return(0);
}

//+------------------------------------------------------------------+
//| Bulls Power                                                      |
//+------------------------------------------------------------------+

int start()
{
   int i,counted_bars=IndicatorCounted();

   if(Bars<=BullsPeriod) return(0);
  
   int limit=Bars-counted_bars;
  
   if(counted_bars>0) limit++;
  
   for(i=0; i<limit; i++)
      TempBuffer[i]=iMA(NULL,0,BullsPeriod,0,MODE_EMA,PRICE_CLOSE,i)-iMA(NULL,0,BullsPeriod,0,MODE_EMA,PRICE_CLOSE,i+1);
      i=Bars-counted_bars-1;
      while(i>=0)
     {

         BullsBuffer[i]=TempBuffer[i];

         i--;
   }
   return(0);
}