How can I set an opposite Pending order on the SL of a Position AND Automatically Cancel it, when the other Position hits a specific targetprice??

[Bayne]

Question is above, This is my Plan:

1 : ->Signal
2 : opening a Position (remembering its SL Level)
3 : setting an opposite pending order with x2 the initial lot size and 10 pips TP and finally setting SL Below/Above your initial trade SL + 5 pips
4 : if your initial trade hit the TP (or Trailingstop) then cancel the pending order (<-this is where I struggle)

I dont find an accurate way to do step 4.

I tried to get the ticket of the initial Position & the Pending (i hope this is right):

         double Ask =SymbolInfoDouble(_Symbol, SYMBOL_ASK);
         Print ("Long!!");
         
         if(LongPosition(Ask,Ask-StopLossLong,Ask+TakeProfitLong))  //Function for Positions
            {
            double Price = Ask-StopLossLong;
            
            LastPosTicketLong = most_recently_opened_Pos();
            
            if(ShortPending(Price,Price+StopLossShort2,Price-TakeProfitShort2)) //Function for Pending Order

               {LastOrderTicketLong = most_recently_opened_Order();}

            Tradeallow=false;
            }
         

...

ulong most_recently_opened_Pos()
   {
    long   youngestPositiontime=0;
    ulong youngestPosition=-1;
    int total =PositionsTotal();               
    for(int i=0;i<total;i++)
              {
              ulong ticket=PositionGetTicket(i);
              long Positiontime = PositionGetInteger(POSITION_TIME);
              
              if (Positiontime > youngestPositiontime)
                     {
                     youngestPositiontime = Positiontime;
                     youngestPosition = ticket; }
              }
    if (youngestPosition>0)
         {
         return(youngestPosition);
         }
else {return(0);}
}



ulong most_recently_opened_Order()
   {
    long   youngestOrdertime=0;
    ulong youngestOrder=-1;
    int total =OrdersTotal();               
    for(int i=0;i<total;i++)
              {
                 if (OrderGetInteger(ORDER_TYPE)==(ORDER_TYPE_BUY_STOP||ORDER_TYPE_SELL_STOP))
                 {
                 ulong ticket=PositionGetTicket(i);
                 long Ordertime = OrderGetInteger(ORDER_TIME_SETUP);
                 
                 if (Ordertime > youngestOrdertime)
                        {
                        youngestOrdertime = Ordertime;
                        youngestOrder = ticket; 
                        }
                 }
               }
    if (youngestOrder>0)
         {
         return(youngestOrder);
         }else {return(0);}
   }          

If this above is right I only need a way, how I can detect if the Initial order has been closed (wether by unchanged SL or by TP/Trailing stop     or    if it made a profit or a loss)

How can i get these Information of the closed Position???

Thank you so much ! :O