Enable DLL imports
The Titan Expert Advisor uses external libraries to perform certain actions and requires us to enable the import of DLL files.
How to enable DLL imports
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Open MetaTrader 4 and select "Tools" and then "Options" from the menu ( Ctrl + O) 
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In the Options dialog, select the "Expert Advisors" tab  By default, the "Allow DLL imports" option is disabled. 
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Enable the "Allow DLL imports" option  
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Click "OK" to confirm the changes