13008d1155015516-indicators-alert-signal-shi_silvertrendsigalert_001

//+------------------------------------------------------------------+
//|                                           SHI_SilverTrendSig.mq4 |
//|          Copyright © 2003, VIAC.RU, OlegVS, GOODMAN, 2005 Shurka |
//|                                                 shforex@narod.ru |
//|                                                                  |
//|                                                                  |
//| Ïèøó ïðîãðàììû íà çàêàç                                          |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, Shurka"
#property link      "http://shforex.narod.ru"

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Blue
#property indicator_color2 Red
#define  SH_BUY   1
#define  SH_SELL  -1

//---- Âõîäíûå ïàðàìåòðû
extern int     AllBars=0;//Äëÿ ñêîëüêè áàðîâ ñ÷èòàòü. 0 - äëÿ âñåõ.
extern int     Otstup=30;//Îòñòóï.
extern double  Per=9;//Ïåðèîä.
extern bool    UseAlert = true;

int            SH,NB,i,UD;
double         R,SHMax,SHMin;
double         BufD[];
double         BufU[];
//+------------------------------------------------------------------+
//| Ôóíêöèÿ èíèöèàëèçàöèè                                            |
//+------------------------------------------------------------------+
int init()
{
   // NB çàïèñûâàåì êîëè÷åñòâî áàðîâ äëÿ êîòîðûõ ñ÷èòàåì èíäèêàòîð
   if (Bars<AllBars+Per || AllBars==0) NB=Bars-Per; else NB=AllBars;
   IndicatorBuffers(2);
   IndicatorShortName("SHI_SilverTrendSig");
   SetIndexStyle(0,DRAW_ARROW,0,1);
   SetIndexStyle(1,DRAW_ARROW,0,1);
   SetIndexArrow(0,159);
   SetIndexArrow(1,159);
   SetIndexBuffer(0,BufU);
   SetIndexBuffer(1,BufD);
   SetIndexDrawBegin(0,Bars-NB);//Èíäèêàòîð áóäåòîòîáðàæàòüñÿ òîëüêî äëÿ NB áàðîâ
   SetIndexDrawBegin(1,Bars-NB);
   ArrayInitialize(BufD,0.0);//Çàáü¸ì îáà áóôåðà íîëèêàìè. Èíà÷å áóäåò ìóñîð ïðè ñìåíå òàéìôðåéìà.
   ArrayInitialize(BufU,0.0);
   return(0);
}
//+------------------------------------------------------------------+
//| Ôóíêöèÿ äåèíèöèàëèçàöèè                                          |
//+------------------------------------------------------------------+
int deinit()
{
   return(0);
}
//+------------------------------------------------------------------+
//| Ñîáñíà èíäèêàòîð                                                 |
//+------------------------------------------------------------------+
int start()
{
   int CB=IndicatorCounted();
   /* Òóò âîò òà ñàìàÿ îïòèìèçàöèîííàÿ ôèøêà.  ÿçûê ââåäåíà ôóíêöèÿ, êîòîðàÿ âîçâðàùàåò êîëè÷åñòâî
   ïîñ÷èòàííûõ áàðîâ, ïðè÷¸ì î÷åíü õèòðî. Ïðè ïåðâîì âûçîâå èíäèêàòîðà ýòî 0, âñ¸ ïîíÿòíî, åù¸ íè÷åãî
   íå ñ÷èòàëîñü, à çàòåì âûäà¸ò êîëè÷åñòâî îáñ÷èòàííûõ áàðîâ ìèíóñ îäèí. Ò.å. åñëè âñåãî áàðîâ 100,
   òî ôóíêöèÿ âåðí¸ò 99. ß ââ¸ë òàêîé êîä, âûøå ó ìåíÿ îïðåäåëÿëàñü NB - êîë-âî áàðîâ ïîäëåæàùèõ
   îáñ÷¸òó.  ïðèíöèïå ýòîò ïàðàìåòð ìîæíî è âûêèíóòü, îäíàêî äëÿ òåõ êòî â òàíêå (I80286) ìîæíî
   è îñòàâèòü. Òàê âîò, çäåñü, ïðè ïåðâîì âûçîâå NB îñòà¸òñÿ ïðåæíåé, à ïðè ïîñëåäóþùèõ óìåíüøàåòñÿ
   äî ïîñëåäíåãî áàðà, ò.å. 1 èëè 2, íó èëè ñêîëüêî òàì îñòàëîñü ïîñ÷èòàòü*/
   if(CB<0) return(-1); else if(NB>Bars-CB) NB=Bars-CB;
   for (SH=1;SH<NB;SH++)//Ïðî÷¸ñûâàåì ãðàôèê îò 1 äî NB
   {
      for (R=0,i=SH;i<SH+10;i++) {R+=(10+SH-i)*(High[i]-Low[i]);}      R/=55;

      SHMax = High[Highest(NULL,0,MODE_HIGH,Per,SH)];
      SHMin = Low[Lowest(NULL,0,MODE_LOW,Per,SH)];
      if (Close[SH]<SHMin+(SHMax-SHMin)*Otstup/100 && UD!=SH_SELL) { BufU[SH]=Low[SH]-R*0.5; UD=SH_SELL; DoAlert(UD);}
      if (Close[SH]>SHMax-(SHMax-SHMin)*Otstup/100 && UD!=SH_BUY) { BufD[SH]=High[SH]+R*0.5; UD=SH_BUY;  DoAlert(UD);}
   }
   return(0);
}

void DoAlert(int UD)
{
   if (!NewBar() || !UseAlert)
      return;
   string sAction = "Buy";
   if (UD == SH_BUY) // Think there is a problem in the indicator. using Buy instead of sell
      sAction = "Sell";
   Alert(Symbol(), " ",Period()," alert!! ", sAction);
}
bool NewBar()
{
   static datetime dt  = 0;
   if (dt != Time[0])
   {
      dt = Time[0];
      return(true);
   }
   return(false);
}