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Originally Posted by newdigital
I have a question.
What are the Ask, Bid, Bars, Close, Open, High, Low, Time and Volume?
Variables?
It was not mentioned in your lessons. May you describe about that?
What is the difference between Ask - Bid and other above mentioned variables?
Current bar is Bars = 0. Right?
And previous bar is Bars = 1.
And what is Bars = -1. Is it 10 or Is it the future bar?
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Ask, Bid, Bars, Close, Open, High, Low, Time and Volume are functions Although MQL4 called them predefined variables.
Variable means a space in memory and data type you specify.
Function means do something and return some value, For example
Bars collects and returns the number of the bars in chart. So, is it a variable?
Another example will proof for you that they are not variables:
If you type and compile this line of code:
Bars=1;
You will get this error:
'Bars' - unexpected token
That’s because they are not variables hence you can’t assign a value to them.
Please leave their description to lesson 11 (Today
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