Code for sending orders on opening of new bar

I want my EA to perform the same on a live account with tick data than the performance I get when running it in the Strategy Tester under the "Open Prices" model.

That means when I run my normal EA under the Open Prices model in the Strategy Tester I get a certain result - and i want that result to be duplicated when i run the same EA with the code for opening trades at the opening of a new bar under the "every tick" model.

I understand that the following code does not achieve this objective:

bool IsNewCandle() {
   static datetime lastCandleTime;
   if (Time[0] == lastCandleTime) return false;
   lastCandleTime = Time[0];
   return true;
}

void OnTick() {
   if (IsNewCandle()) {
      // rest of logic goes here
   }
}

Please test this properly on a standard MT4  EA before submitting the code.