Slope_Direction_Line

ÿþ//+------------------------------------------------------------------+

//|                                         Slope_Direction_Line.mq5 |

//|                        Copyright 2018, MetaQuotes Software Corp. |

//|                                                 https://mql5.com |

//+------------------------------------------------------------------+

#property copyright "Copyright 2018, MetaQuotes Software Corp."

#property link      "https://mql5.com"

#property version   "1.00"

#property description "Slope Direction Line indicator"

#property indicator_chart_window

#property indicator_buffers 6

#property indicator_plots   2

//--- plot SDL

#property indicator_label1  "SDL"

#property indicator_type1   DRAW_COLOR_LINE

#property indicator_color1  clrGreen,clrRed,clrDarkGray

#property indicator_style1  STYLE_SOLID

#property indicator_width1  2

//--- plot Trend

#property indicator_label2  "Trend direction"

#property indicator_type2   DRAW_LINE

#property indicator_color2  clrNONE

#property indicator_style2  STYLE_SOLID

#property indicator_width2  1

//--- input parameters

input uint                 InpPeriod         =  80;            // Period

input ENUM_MA_METHOD       InpMethod         =  MODE_EMA;      // Method

input ENUM_APPLIED_PRICE   InpAppliedPrice   =  PRICE_CLOSE;   // Applied price

//--- indicator buffers

double         BufferSDL[];

double         BufferColors[];

double         BufferTrend[];

double         BufferMAP[];

double         BufferMAP2[];

double         BufferRAW[];

//--- global variables

int            period_ma;

int            period2;

int            periodSqrt;

int            handle_maP;

int            handle_maP2;

int            weight_sum;

//--- includes

#include <MovingAverages.mqh>

//+------------------------------------------------------------------+

//| Custom indicator initialization function                         |

//+------------------------------------------------------------------+

int OnInit()

  {

//--- set global variables

   period_ma=int(InpPeriod<2 ? 2 : InpPeriod);

   period2=(int)floor(period_ma/2.0);

   periodSqrt=(int)floor(sqrt(period_ma));

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferSDL,INDICATOR_DATA);

   SetIndexBuffer(1,BufferColors,INDICATOR_COLOR_INDEX);

   SetIndexBuffer(2,BufferTrend,INDICATOR_DATA);

   SetIndexBuffer(3,BufferMAP,INDICATOR_CALCULATIONS);

   SetIndexBuffer(4,BufferMAP2,INDICATOR_CALCULATIONS);

   SetIndexBuffer(5,BufferRAW,INDICATOR_CALCULATIONS);

//--- setting indicator parameters

   IndicatorSetString(INDICATOR_SHORTNAME,"SDL ("+(string)period_ma+")");

   IndicatorSetInteger(INDICATOR_DIGITS,Digits());

//--- setting buffer arrays as timeseries

   ArraySetAsSeries(BufferSDL,true);

   ArraySetAsSeries(BufferColors,true);

   ArraySetAsSeries(BufferTrend,true);

   ArraySetAsSeries(BufferMAP,true);

   ArraySetAsSeries(BufferMAP2,true);

   ArraySetAsSeries(BufferRAW,true);

//--- create MA's handles

   ResetLastError();

   handle_maP=iMA(NULL,PERIOD_CURRENT,period_ma,0,InpMethod,InpAppliedPrice);

   if(handle_maP==INVALID_HANDLE)

     {

      Print("The iMA(",(string)period_ma,") object was not created: Error ",GetLastError());

      return INIT_FAILED;

     }

   handle_maP2=iMA(NULL,PERIOD_CURRENT,period2,0,InpMethod,InpAppliedPrice);

   if(handle_maP2==INVALID_HANDLE)

     {

      Print("The iMA(",(string)period2,") object was not created: Error ",GetLastError());

      return INIT_FAILED;

     }

//---

   return(INIT_SUCCEEDED);

  }

//+------------------------------------------------------------------+

//| Custom indicator iteration function                              |

//+------------------------------------------------------------------+

int OnCalculate(const int rates_total,

                const int prev_calculated,

                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[])

  {

//--- @>25@:0 8 @0AGQB :>;8G5AB20 ?@>AG8BK205<KE 10@>2

   if(rates_total<fmax(period_ma,4)) return 0;

//--- @>25@:0 8 @0AGQB :>;8G5AB20 ?@>AG8BK205<KE 10@>2

   int limit=rates_total-prev_calculated;

   if(limit>1)

     {

      limit=rates_total-2;

      ArrayInitialize(BufferSDL,EMPTY_VALUE);

      ArrayInitialize(BufferTrend,0);

      ArrayInitialize(BufferMAP,0);

      ArrayInitialize(BufferMAP2,0);

      ArrayInitialize(BufferRAW,0);

     }

//--- >43>B>2:0 40==KE

   int count=(limit>1 ? rates_total : 1),copied=0;

   copied=CopyBuffer(handle_maP,0,0,count,BufferMAP);

   if(copied!=count) return 0;

   copied=CopyBuffer(handle_maP2,0,0,count,BufferMAP2);

   if(copied!=count) return 0;



   for(int i=limit; i>=0 && !IsStopped(); i--)

     {

      BufferRAW[i]=2.0*BufferMAP2[i]-BufferMAP[i];

     }

   switch(InpMethod)

     {

      case MODE_EMA  :  if(ExponentialMAOnBuffer(rates_total,prev_calculated,period_ma,periodSqrt,BufferRAW,BufferSDL)==0) return 0;               break;

      case MODE_SMMA :  if(SmoothedMAOnBuffer(rates_total,prev_calculated,period_ma,periodSqrt,BufferRAW,BufferSDL)==0) return 0;                  break;

      case MODE_LWMA :  if(LinearWeightedMAOnBuffer(rates_total,prev_calculated,period_ma,periodSqrt,BufferRAW,BufferSDL,weight_sum)==0) return 0; break;

      //---MODE_SMA

      default        :  if(SimpleMAOnBuffer(rates_total,prev_calculated,period_ma,periodSqrt,BufferRAW,BufferSDL)==0) return 0;                    break;

     }

   

//---  0AGQB 8=48:0B>@0

   for(int i=limit; i>=0 && !IsStopped(); i--)

     {

      BufferTrend[i]=(BufferSDL[i]>BufferSDL[i+1] ? 1 : BufferSDL[i]<BufferSDL[i+1] ? -1 : BufferTrend[i+1]);

      BufferColors[i]=2;

      if(BufferTrend[i]>0)

        {

         BufferColors[i]=0;

         if(BufferTrend[i+1]<0)

            BufferColors[i+1]=0;

        }

      else

        {

         BufferColors[i]=1;

         if(BufferTrend[i+1]>0)

            BufferColors[i+1]=1;

        }

     }

   

//--- return value of prev_calculated for next call

   return(rates_total);

  }

//+------------------------------------------------------------------+