for (int i = 0; i < count; i++)
{
   if (le == null)
      {
          if (sma[i] < sec.Bars[i].Close)
          {
           ...
          }
      }
}

            
for (int i = 0; i < count; i++)
{
   if (le == null && sma[i] < sec.Bars[i].Close)
      {
       ...
      }
}