Timer not working

Hi all,

I would like to get a timer to close open trades on Saturday and start on Sunday.

For that I try the to use the follow code, but with it no orders are opening. Could you tell me what am I doing wrong ?

extern int    StartHourOnSunday      =   21;    
extern int    LastHourOnFriday       =   21;  

if(Bid > BuyTrigger && BuyAllowed && TradingHours() == true)    
     {//5       
                 RefreshRates();                               
       BuyTicket = OrderSend(Symbol(),OP_BUY,Lots,Ask,Slippage*pips2points,0,0,"Initial Buy Order",MagicNumber,0,Green);
       if(BuyTicket > -1)      

     bool TradingHours()
 //----      
        {   
       if(DayOfWeek()== 5 && Hour()>= LastHourOnFriday)CloseOpen();
       if(DayOfWeek()== 0 && Hour()>= StartHourOnSunday)
       if(Hour() <= LastHourOnFriday) return (true);
 //----                  
       return (false);
        } 

Thank you in advance for any support provided.

Luis