Forex MT4 coding 2 variable Structure

MT4 variable structure

Look at MACD Sample code for example.

Properties show the code owner

Global variable

This part used for declare  global variable, which variable in this part would able to see and able to used by every function of code
(so these variable name in this part should be unique name)

Function variable

Variable in this part able to used in this part only unable to used by other function.