OrderOpenPrice() not working for buy low

ok angevoyageur i have got it right while waiting for your reply, i actually did not add ordertype() so thats why it fail

but pls i wonder why is it that i did not add Type==OP_SELL

Type==OP_SELL 

in sell signal and its working fine. WHY i did not add it to its opposite buy and it failed

2 QUESTION .pls below is my orderselect specifically for buy low, did i got it right ? why i ask is check this lines in red to know whether i got the argument right !. i have to put bool argument on my selections like false buy/sell  to prevent my ea FROM  opening buy above ask

     Symb=Symbol();   
                      
   double  OpenPrice=0;       <-----------------
      Ticket =0;               <-----------------  
      lastTradeLots=0;         <-----------------     
   for(int i=0; i < OrdersTotal(); i++) // Loop through orders
     {
      if(OrderSelect(i,SELECT_BY_POS, MODE_TRADES)) // If there is the next one
        {  
        
         if(OrderSymbol()!=Symb)continue;     // Another security
          if( Type == OP_BUY )
         if(OrderMagicNumber()!= magicbuy && OrderMagicNumber()!= msellmagic)continue;
         Total++;                          // Counter of market orders
        if(lastTradeLots > 0 && Ticket > 0 && OpenPrice > 0 )     <--------------------------------------------  prevention from opening above low
         if(Opn_B==false)continue;                                  <--------------------------------------------   if the prevention is right buy is no or false
                           
         Ticket=OrderTicket();                  // Number of selected order
         Type   =OrderType();                    // Type of selected order
         OpenPrice =OrderOpenPrice();               // OPENPrice of selected order     
         lastTradeLots   =OrderLots();                     // Amount of lots
        }
     } 


           Opn_B=Type==OP_BUY && Ask <= OrderOpenPrice())     <--------------------------------------------  worked very well

           Opn_B=Type==OP_BUY && Ask <= OpenPrice )     <--------------------------------------------  failed or no order opened on signal point


why did first raw function worked
OrderOpenPrice() ?

and

why did second linked with function failed 
OrderOpenPrice() ?