Need Help please, nothing is happening

[Kerkad]

#include <Trade\Trade.mqh>
CTrade trade;
  int a =0;

void OnTick()
  {

   double RsiArray[];
   int rsi = iRSI(_Symbol,PERIOD_CURRENT, 14, PRICE_CLOSE);
   ArraySetAsSeries(RsiArray,true);
   CopyBuffer(rsi,0,0,3, RsiArray);
   double rsivalue=NormalizeDouble(RsiArray[0],2);

double Ask=NormalizeDouble(SymbolInfoDouble(_Symbol,SYMBOL_ASK),_Digits);
double Bid=NormalizeDouble(SymbolInfoDouble(_Symbol,SYMBOL_BID),_Digits);
if(rsivalue<40)
  {
a=5;
trade.Buy(0.10,NULL,(Ask-1000*_Point),(Ask+500*_Point),NULL);
CheckTrailingStop(Ask);
  }
  if(rsivalue>60)
  {
  a=10;
  trade.Sell(0.1,NULL,(Bid-1000*_Point),(Bid+500*_Point),NULL);
CheckTrailingStop1(Bid);
  } 
Comment(a);
  }

//+------------------------------------------------------------------+
void CheckTrailingStop(double Ask)
{
double SL=NormalizeDouble(Ask-150*_Point,_Digits);
for (int i=PositionsTotal()-1;i>=0;i--)
{
string symbol=PositionGetSymbol(i);

   if (Symbol()==symbol)
   {
   ulong PositionTicket=PositionGetInteger(POSITION_TICKET);
   double CurrentStopLoss=PositionGetDouble(POSITION_SL);

      if (CurrentStopLoss<SL)
      {
      trade.PositionModify(PositionTicket,(CurrentStopLoss+10*Point()),0);
      }
   }
}}

void CheckTrailingStop1(double Bib)
{
double SL=NormalizeDouble(Bib+150*Point(),Digits());
for (int i=PositionsTotal()-1;i>=0;i--)
{
string symbol=PositionGetSymbol(i);

   if (_Symbol==symbol)
   {
   ulong PositionTicket=PositionGetInteger(POSITION_TICKET);
   double CurrentStopLoss=PositionGetDouble(POSITION_SL);

      if (CurrentStopLoss<SL)
      {
      trade.PositionModify(PositionTicket,(CurrentStopLoss-10*_Point),0);
      } 
   }
}}

Hi guys,

I wanted to test Stop Loss Function, so i use this simple code. But nothing is happening. During the backtest no buy or sell order

Can you help me please

Thank you for your time