I strongly recommend all the TS users here to get in the habit of at least once a week clearing your data cache. I have been finding minor errors in the data on my HD. I have found this problem on another machine as well. I think the root of the problem is that TS doesn't error check the data files, as they are updated over weeks or months. To clear the cache and refresh all your data to more accurately reflect the data stored on TS's servers, go to your C:\Program Files\TradeStation\Program\Cache and delete all the files found there. If you don't believe that this can affect you system results. Run your fav system before and after clearing the data files. I have noticed a big difference (several K) in a few of my systems.