The most common reason for this is that you have exceeded the daily Maximum Profit or Loss for the chart. If the Daily Max P/L % is either > 100% or < -100%, then increase the limits in S3 Inputs (or T3 or W3 inputs as the case may be.) Other reasons:
- For S3 V1.0: Check that the time is correct for the chart (RTH or Globex).
- For all S3 and T3: Try closing the chartbook and reloading it.
- Try restarting Sierra Chart and reloading.
- Make sure the Spreadsheet study is not hidden.
- Try extracting the original files from the zip file again.
If none of this works, try the instructions here to verify Auto Trade functionality: https://www.sierrachart.com/index.php?page=doc/SpreadsheetTradingTestProcedure.php