Trailing_Stop_Level

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

//|                                          Trailing_Stop_Level.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 "Trailing Stop level indicator"

#property indicator_chart_window

#property indicator_buffers 3

#property indicator_plots   2

//--- plot LevUP

#property indicator_label1  "Level for short"

#property indicator_type1   DRAW_LINE

#property indicator_color1  clrRed

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- plot LevDN

#property indicator_label2  "Level for long"

#property indicator_type2   DRAW_LINE

#property indicator_color2  clrGreen

#property indicator_style2  STYLE_SOLID

#property indicator_width2  1

//--- input parameters

input double   InpPercent  =  30; // Percent

//--- indicator buffers

double         BufferLevUP[];

double         BufferLevDN[];

double         BufferData[];

//--- global variables

double         percent;

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- set global variables

   percent=(InpPercent<1 ? 1 : InpPercent/100.0);

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferLevUP,INDICATOR_DATA);

   SetIndexBuffer(1,BufferLevDN,INDICATOR_DATA);

   SetIndexBuffer(2,BufferData,INDICATOR_CALCULATIONS);

//--- setting indicator parameters

   IndicatorSetString(INDICATOR_SHORTNAME,"TrailingStopLevel("+DoubleToString(percent,2)+")");

   IndicatorSetInteger(INDICATOR_DIGITS,Digits());

//--- setting buffer arrays as timeseries

   ArraySetAsSeries(BufferLevUP,true);

   ArraySetAsSeries(BufferLevDN,true);

   ArraySetAsSeries(BufferData,true);

//---

   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 =0 <8=8<0;L=>5 :>;85AB2> 10@>2 4;O @0AGQB0

   if(rates_total<4) return 0;

//--- #AB0=>2:0 <0AA82>2 1CD5@>2 :0: B09<A5@89

   ArraySetAsSeries(close,true);

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

   int limit=rates_total-prev_calculated;

   if(limit>1)

     {

      limit=rates_total-2;

      ArrayInitialize(BufferLevUP,EMPTY_VALUE);

      ArrayInitialize(BufferLevDN,EMPTY_VALUE);

      ArrayInitialize(BufferData,0);

     }

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

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

     {

      double loss=close[i]*percent/100;

      if(close[i]>BufferData[i+1] && close[i+1]>BufferData[i+1])

        {

         BufferData[i]=fmax(BufferData[i+1],close[i]-loss);

         BufferLevDN[i]=BufferData[i];

         BufferLevDN[i+1]=BufferData[i+1];

        }

      else

        {

         if(close[i]<BufferData[i+1] && close[i+1]<BufferData[i+1])

           {

            BufferData[i]=fmin(BufferData[i+1],close[i]+loss);

            BufferLevUP[i]=BufferData[i];

            BufferLevUP[i+1]=BufferData[i+1];

           }

         else

           {

            if(close[i]>BufferData[i+1])

              {

               BufferData[i]=close[i]-loss;

               BufferLevDN[i]=BufferData[i];

               BufferLevUP[i+1]=BufferData[i+1];

              }

            else

              {

               BufferData[i]=close[i]+loss;

               BufferLevUP[i]=BufferData[i];

               BufferLevDN[i+1]=BufferData[i+1];

              }

           }

        }

     }



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

   return(rates_total);

  }

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