Percentage_Crossover_Channel

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

//|                                 Percentage_Crossover_Channel.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 indicator_chart_window

#property indicator_buffers 4

#property indicator_plots   3

//--- plot Upper

#property indicator_label1  "Upper"

#property indicator_type1   DRAW_LINE

#property indicator_color1  clrRed

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- plot Middle

#property indicator_label2  "Middle"

#property indicator_type2   DRAW_LINE

#property indicator_color2  clrBlue

#property indicator_style2  STYLE_SOLID

#property indicator_width2  1

//--- plot Lower

#property indicator_label3  "Lower"

#property indicator_type3   DRAW_LINE

#property indicator_color3  clrSeaGreen

#property indicator_style3  STYLE_SOLID

#property indicator_width3  1

//--- input parameters

input double               InpPercent  =  100.0;         // Percent

input ENUM_APPLIED_PRICE   InpPrice    =  PRICE_CLOSE;   // Applied price

//--- indicator buffers

double         BufferUpper[];

double         BufferMiddle[];

double         BufferLower[];

double         BufferSMA[];

//--- global variables

double         percent;

double         plus_value;

double         minus_value;

int            handle_ma;

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- settings variables

   percent=(InpPercent<=0 ? 0.001 : InpPercent)/100;

   plus_value=1+percent/100;

   minus_value=1-percent/100;

   handle_ma=iMA(Symbol(),PERIOD_CURRENT,1,0,MODE_SMA,InpPrice);

   if(handle_ma==INVALID_HANDLE){

      Print("Error creating MA handle");

      return INIT_FAILED;

      }

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferUpper,INDICATOR_DATA);

   SetIndexBuffer(1,BufferMiddle,INDICATOR_DATA);

   SetIndexBuffer(2,BufferLower,INDICATOR_DATA);

   SetIndexBuffer(3,BufferSMA,INDICATOR_CALCULATIONS);

//--- settings indicators parameters

   IndicatorSetString(INDICATOR_SHORTNAME,"Percentage Crossover Channel");

//--- set arrays as timeseries

   ArraySetAsSeries(BufferLower,true);

   ArraySetAsSeries(BufferMiddle,true);

   ArraySetAsSeries(BufferUpper,true);

   ArraySetAsSeries(BufferSMA,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;

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

   int limit=rates_total-prev_calculated;

   if(limit>1)

     {

      limit=rates_total-2;

      ArrayInitialize(BufferLower,EMPTY_VALUE);

      ArrayInitialize(BufferMiddle,EMPTY_VALUE);

      ArrayInitialize(BufferUpper,EMPTY_VALUE);

      ArrayInitialize(BufferSMA,EMPTY_VALUE);

      int copied=CopyBuffer(handle_ma,0,0,rates_total,BufferSMA);

      if(copied!=rates_total) return 0;

     }

//--- &8:; @0AGQB0 8=48:0B>@0

   for(int i=limit; i>=0; i--){

      int total=(limit==0 ? 1 : limit);

      int copied=CopyBuffer(handle_ma,0,0,total,BufferSMA);

      if(copied!=total) return 0;

      double price=BufferSMA[i];

      if(limit>1 && i==limit)

         BufferMiddle[i]=price;

      else

         BufferMiddle[i]=(price*minus_value>BufferMiddle[i+1] ? price*minus_value : price*plus_value<BufferMiddle[i+1] ? price*plus_value : BufferMiddle[i+1]);

      BufferUpper[i]=BufferMiddle[i]*plus_value;

      BufferLower[i]=BufferMiddle[i]*minus_value;

      }

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

   return(rates_total);

  }

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