Set of common functions

Hello!

I'm looking for a standard set of functions to open/close orders, error management, money management, trailing stops, etc... does it exists?

It will save my code writing time.

Thanks in advance!!

in the mql4 book there are several useful functions described with source code for error handling, open and closing orders, multiple order management etc https://www.mql4.com/files/MQl4BookEnglish.chm

common_functions.mqh <-- you will find it with the help of google

Thank you!