Questions from Beginners MQL5 MT5 MetaTrader 5 - page 1162

[Fast235]

Roman:

Thank you.

but you should know that there are 4 ways to call or specify the current character

Symbol
_Symbol
Symbol()
и 0

the first 2 are useless (no one wants to store a character in a predefined variable and change it), and the help is interesting, I've flipped the whole forum 10 times in my time, all options are found in the MQ code and representatives)

[Roman]

Fast235:

but you should know that there are 4 ways to call or specify the current character

There are nuances in 2 cases, and the help is interesting, I turned the whole forum over 10 times in my time.

I always use predefined variables, like

_Symbol

[Fast235]

Roman:

I always use predefined variables, like

do you think that's right?

[Roman]

Fast235:

do you think that's right?

Reading a variable, faster than a function.

[Fast235]

Roman:

Reading a variable, faster than a function.

specifically on symbols is not the right answer.

there are others like this

[Roman]

Fast235:

(unlikely to store a character in a predefined variable and change the character)

The _Symbol variable already stores the name of the current chart symbol, no need to assign a symbol name to it ))

[Vladimir Karputov]

Roman:

Reading a variable, faster than a function.

There is no difference. When compiling, everything comes together in a single call. That's why it's better to do everything through functions.

[Fast235]

Roman:

The _Symbol variable already stores the symbol name of the current chart, no need to assign a symbol name to it ))

and if multicurrency or chart change

[Roman]

Fast235:

and if multicurrency

Then the function.
You forgot to mention that another function can also be used

SymbolInfoDouble(_Symbol, ...

Different tasks, different code.

[Roman]

Vladimir Karputov:

There is no difference. When compiling, everything comes together in a single call. That's why it's better to do everything through functions.

If it is entered, then there is a difference.
Reading an initialized variable is always faster than reading a function.
A function performs extra actions to return a value.
A variable already contains that value.