Hello
Can Someone kindly explain in easy terms with an example these issues:

1) What Does Sleep(3000) operator(or whatver u call it) do in betwen codes.
I have seen it many times in between if statements in many codes!

Two) Exactly what exactly does break; Function do?

3)What various types of Extern varaiables are available? Such as Strings, double and their usage?

4) Can MQL5 will be quite different from MQL4? I assume its released. . .any guess how different?

If possible, can somebody link to/post/pm some simple information abt Understanding, or even coding(as of now) MQL4.
I have lot of complied stuff/links etc.. . But time spent doesnt really fix the simple information I want (as of today)

Thanks in advance!
Regards