Expert Advisor Programming by Andrew R. Young

EXPERT ADVISOR PROGRAMMING
case 138:
return(true);
case 146:
return(true);
// Requotes
// Trade context busy
}
}
default:
return(false);
This function uses the switch operator. We are looking for a case label whose value matches the
expression assigned to the switch operator (in this example, ErrorCode). If a matching case is
found, the code after case is executed. If no case label matches, then the code after the default
label is executed.
When a case match is found, the switch block must be exited with a break or return operator. In
this example, we are using the return operator to return a true/false value back to the calling
function. The switch operator can be useful for evaluating a match for an integer constant, but its
utility is rather limited.
Here is how we use ErrorCheck() to conditionally retry an order placement:
int Retries;
int MaxRetries = 5;
int Ticket;
while(Ticket