how to add use-time and password for mt4 indicators?

I have one mt4 indicator,I want to add one function into it.I dont know how use the mq4 language.

Add Function:
I want to limit use-time to this indicator,when expire user need to type password then continue to use this indicator.


best wishes!
Minquan

Just out of curiosity: This is the most bizarre programming request i have read for quite some time. Why on earth would someone want to use the indicator that you just posted in source code form, written by someone else ("I dont know how use the mq4 language") modified with such a bizarre limitation?

Sounds like you want to sell it.

Also, the only way you can really expect this to not be decompiled by someone else is not to distribute it.