Thanks.

When I don't set HEDGING, a reverse order means exit?

For example is below. It doesn't have a exit order.

Code:
function run()
{
  vars Price = series(price());
  vars Trend = series(LowPass(Price,1000));

  Stop = 4*ATR(100);
  if(valley(Trend))
    enterLong();
  else if(peak(Trend))
    enterShort();
}