Why aren't my Expert Advisors and Indicators working?
Occasionally, you will see some of your Expert Advisors (EAs) and Indicators not working. This can happen when you have updated the autotrading script or updated your MetaTrader 4 (MT4) platform.
Many users who have updated to MT4 Build 600 and higher have reported having these problems. If you have just recently updated to the MT4 Build 600+and are having issues, please make sure you have relocated your files to the new location before proceeding with the following steps.
How to recompile EAs and indicators in MT4
1. Open your MT4. Press F4 to open the Metaquotes Language Editor.
2. The following should appear
3. Click on the desired folder you wish to recompile.
4. Click on the 'Compile' button from the main menu bar above.