Was fehlt in diesem einfachen Expert Advisor ?

Guten Abend Leute, und zwar versuche ich hier einen EA zusammen zu basteln, und halte mich an die Anleitung in diesem Link:

https://www.mql5.com/de/articles/4236

Doch irgend was muss fehlt hier in diesem Code.

Mit freundlichen Grüßen.

//+------------------------------------------------------------------+
//|                                                     DREIECK .mq5 |
//|                                                 Copyright 2018,  |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2018,"
#property link      "https://www.mql5.com"
#property version   "1.00"

#define O(i) (r[i].open)
#define H(i) (r[i].high)
#define L(i) (r[i].low)
#define C(i) (r[i].close)

//Parameter 
input int      inp_ref=50;

input int      inp_timeout=5;
input bool     inp_bullish_pin_bar = true;
input bool     inp_bearish_pin_bar = true;
input bool     inp_bullish_engulfing = true;
input bool     inp_bearish_engulfing = true;
input double   inp_lot_size=1;

//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+


CDuration time;

int OnInit()
  {
   time.Start();
   // ... 
   return(INIT_SUCCEEDED);
  }

void OnDeinit(const int reason)
  {
   time.Stop();
   Print("Test lasted "+time.ToStr());
  }

//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//---
   
  }
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
   //--- bearbeiten der offenen Positionen
   int total= PositionsTotal();
   for(int i=0;i<total;i++)
     {
      PositionSelect(_Symbol);
      datetime t0=datetime(PositionGetInteger(POSITION_TIME));
      if(TimeCurrent()>=(t0+(inp_timeout*3600)))
        {
         trade.PositionClose(PositionGetInteger(POSITION_TICKET));
        }
      else
         break;
     }
   if(IsNewBar()==false)
      return;
//--- prüfen auf vorhandene Muster
   ENUM_PATTERN pat=IsPattern(p_flags,inp_ref);
   if(pat==PAT_NONE)
      return;
//--- Positionseröffnung
   double ask=SymbolInfoDouble(_Symbol,SYMBOL_ASK);
   double bid=SymbolInfoDouble(_Symbol,SYMBOL_BID);
   if((pat&(PAT_ENGULFING_BULLISH|PAT_PINBAR_BULLISH))!=0)//Kauf     
      trade.Buy(inp_lot_size,_Symbol,ask,NormalizeDouble(ask-inp_sl*_Point,_Digits),NormalizeDouble(ask+inp_tp*_Point,_Digits),DoubleToString(ask,_Digits));
   else//Verkauf
      trade.Sell(inp_lot_size,_Symbol,bid,NormalizeDouble(bid+inp_sl*_Point,_Digits),NormalizeDouble(bid-inp_tp*_Point,_Digits),DoubleToString(bid,_Digits));

  }
//+------------------------------------------------------------------+