Session_Buy_Sell_Orders

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

//|                                      Session Buy Sell Orders.mq5 |

//|                              Copyright © 2017, Vladimir Karputov |

//|                                           http://wmua.ru/slesar/ |

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

#property copyright "Copyright © 2017, Vladimir Karputov"

#property link      "http://wmua.ru/slesar/"

#property version   "1.001"

#property description "Number of Buy and Sell orders at the moment"

#property indicator_separate_window

#property indicator_buffers 2

#property indicator_plots   2

//--- plot Buy

#property indicator_label1  "Buy orders"

#property indicator_type1   DRAW_HISTOGRAM

#property indicator_color1  clrBlue

#property indicator_style1  STYLE_SOLID

#property indicator_width1  3

//--- plot Sell

#property indicator_label2  "Sell orders"

#property indicator_type2   DRAW_HISTOGRAM

#property indicator_color2  clrRed

#property indicator_style2  STYLE_SOLID

#property indicator_width2  3

//--- indicator buffers

double         BufferBuy[];

double         BufferSell[];

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

   Print(__FUNCTION__);

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferBuy,INDICATOR_DATA);

   SetIndexBuffer(1,BufferSell,INDICATOR_DATA);

//---

   PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0);

   PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,0);

//---

   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[])

  {

//---

   double sov_buy=(double)SymbolInfoInteger(Symbol(),SYMBOL_SESSION_BUY_ORDERS);

   double sov_sell=(double)SymbolInfoInteger(Symbol(),SYMBOL_SESSION_SELL_ORDERS);

//---

   int limit=prev_calculated-1;

   if(prev_calculated==0)

     {

      ArrayInitialize(BufferBuy,0.0);

      ArrayInitialize(BufferSell,0.0);

      return(rates_total);

     }

   for(int i=limit;i<rates_total;i++) // 2 A;CG05 :>340 prev_calculated==0 8;8 :>340 limit>1

     {

      BufferBuy[i]=sov_buy;

      BufferSell[i]=-sov_sell;

     }

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

   return(rates_total);

  }

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