how do i declare variables, compare them and then use them inside a function

Question

i am developing an ea that requires me to compare the high of previous 2 bars and whichever one is higher, use that as a stop loss value.

same for opposite side trades, i need to compare previous 2 lows and use the lower one as stop loss value.

what i am doing is this:-

void onTick()
{
  static int ticket=0;

  double ab=(//calculation for ab);
  double de=(//calculation for de); 
   if(Low[1]<Low[2])
      double sll=Low[1];
   if(Low[1]>Low[2])
      double sll=Low[2];
  if(buy logic comes here) 
  {
   double entryPrice=////////;
   double stoploss=sll-xyz;
   double takeprofit=entryPrice+((entryPrice-stoploss)*3);
   ticket = OrderSend(Symbol(),...entryPrice,stoploss,takeprofit,.....);
  }
    if(ticket == false)
         {
           Alert("Order Sending Failed");
         }
}

the problem is i am not able to reference the values of sll and get an error message saying "sll undeclared identifier"

i am fairly new to programming and would appreciate if someone can help me out with this. I have added most of the code for you to understand the logic.

Mark Mark · Accepted Answer · 2015-04-05T07:55:03

you would have to declare them outside the scope of the if statements if you want to use variables anywhere else so instead of doing that take a look at this

double sll; // declare sll outside the if statements
if(Low[1]<Low[2])
   sll=Low[1];
if(Low[1]>Low[2])
   sll=Low[2];
if(buy logic comes here) 
{
 bool res = OrderSend(..........);
}

Judging by what you wrote, it looks like you may be using res somewhere else too which then you need to define outside of the if statement because scoping.

how do i declare variables, compare them and then use them inside a function

1 Answers