The following (silly) strategy Tested against AUD/USD using the official downloaded History dies for Error 111: Crash in script. at Bar 12034.

Why?
Code:
function run() {
  StartDate = 20090901;
  EndDate = 20140901;
  BarPeriod = 60;
  Hedge = 2;
  TradesPerBar = 256;

  var atrx = ATR(200);
  Stop = atrx * 3.0;
  Trail = atrx * 1.0;
  TrailLock = 50;
  int trade_num;
  for (trade_num = 0; trade_num < 147; trade_num++) {
    enterLong();
  }
}