Can An EA be built from a .ex4 file without the actual .mq4 source file

 
I badly need to develop an EA but all I have is the .ex4 file. I will like to know if the EA can be built and is there any performance related difference with building with .ex4 or .mq4 file and also is there a way to convert .ex4 to .mq4 file.
 
Mayowa Sonaike:
I badly need to develop an EA but all I have is the .ex4 file. I will like to know if the EA can be built and is there any performance related difference with building with .ex4 or .mq4 file and also is there a way to convert .ex4 to .mq4 file.

If you mean to write an EA using an indicator ex4 then usually you can still read the buffer values.

If you mean that you want to modify an EA that you only have the ex4 file, then no.

Converting an ex4 to mq4 would require decompiling the code and this is not allowed.