Trade in Both Directions

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In order to make a certain set of triggers open trades in both directions (yes, it makes no sense opening trades in both directions with only one set of triggers, I know), do you need to use magic numbers (if magic numbers are required, where should I go to read about them?)? I have modified a sample EA that was on this site to read like this. How would I make this open trades in both directions simultaneously?

// check for long position (BUY) possibility
if(MacdCurrent>0 && MacdPrevious<0)
{
ticket=OrderSend(Symbol(),OP_BUY,Lots,Ask,3,Ask-SL*Point,Ask+TakeProfit*Point,"macd sample",16384,0,Green);
if(ticket>0)
{
if(OrderSelect(ticket,SELECT_BY_TICKET,MODE_TRADES)) Print("BUY order opened : ",OrderOpenPrice());
}
else Print("Error opening BUY order : ",GetLastError());
return(0);
}
// check for short position (SELL) possibility
if(MacdCurrent>0 && MacdPrevious<0)
{
ticket=OrderSend(Symbol(),OP_SELL,Lots,Bid,3,Bid+SL*Point,Bid-TakeProfit*Point,"macd sample",16384,0,Red);
if(ticket>0)
{
if(OrderSelect(ticket,SELECT_BY_TICKET,MODE_TRADES)) Print("SELL order opened : ",OrderOpenPrice());
}
else Print("Error opening SELL order : ",GetLastError());
return(0);
}
return(0);
}