This may be more of an Excel thing than a MarketXLS but I just realized last week (after several years of use) that there is a difference between NA and N/A outputs. NA as I have come to understand it means no data. If I rerun the formula over and over I will never get data from it as there is nothing or the request is invalid. N/A however, generally means a memory was overloaded or a failure to transmit the data. If I rerun the formula it often will populate the data. For a beginner user, is there a way to output ERROR or Rerun or some sort of warning for N/As? I've also noticed if I run 50 formulas at once, there sometimes is a pattern in the output, like every fourth data point is an N/A failure.