Need to Hide All Symbols

[Saed Modarresi]

By SymbolSelect function we can hide a symbol in MarketWatch but we can't "Hide All" .

This is a problem when we have so many symbols in Market Watch List.

How I can hid all symbols on it?

[Vladimir Karputov]

Saed Modarresi:

By SymbolSelect function we can hide a symbol in MarketWatch but we can't "Hide All" .

This is a problem when we have so many symbols in Market Watch List.

How I can hid all symbols on it?

Code:

//--- remove all symbols from the Market Watch
   int symbols_total=SymbolsTotal(true);
   for(int i=symbols_total-1; i>=0; i--)
     {
      string symbol_name=SymbolName(i,true);
      SymbolSelect(symbol_name,false);
     }

[William Roeder]

Saed Modarresi: By SymbolSelect function we can hide a symbol in MarketWatch but we can't "Hide All" .

Correct, the current symbol can't be. Other symbols can be hidden 10 minutes after last use, as Vladimir showed.

[Saed Modarresi]

William Roeder:

Correct, the current symbol can't be. Other symbols can be hidden 10 minutes after last use, as Vladimir showed.

Thank you but when we have 2000 symbol in Market Watch List, this loop work for long time.

We need a function that it can hide all symbol.

for example:

SymbolSelect("*", false);

[Saed Modarresi]

Can anyone propose a viable solution to this issue?

[Vladimir Karputov]

Saed Modarresi :
Can anyone propose a viable solution to this issue?

You were answered above.

[Saed Modarresi]

Vladimir Karputov:

You were answered above.

Yes but when we have 2000 symbol in Market Watch List, this loop work for long time.

We need a function that it can hide all symbol immediately.

for example:

SymbolSelect("*", false);

[Vladimir Karputov]

Saed Modarresi :

Yes but when we have 2000  symbol in Market Watch  List, this loop work for long time.

We need a function that it can hide all symbol immediately .

for example:

SymbolSelect("*", false);

5000 characters are deleted in three seconds:

2020.11.15 09:27:04.822 Scripts script remove all symbols (FB.cfd,Daily) loaded successfully
2020.11.15 09:27:07.221 Scripts script remove all symbols (FB.cfd,Daily) removed

that's not for long.

[Saed Modarresi]

Vladimir Karputov:

5000 characters are deleted in three seconds:

that's not for long.

It's great, but practically the rows, one by one of the internal arrays of the system, have been deleted.

Updating this internal array, under different conditions, costs MetaTrader5 and creates a different time delay on different computers with different system resources.

Of course, I think the new option recently added to the Settings section has somewhat hidden this problem:

"Preload chart data for open positions and orders"

However, I hope that MQL5 makers will create functions to improve and increase efficiency.

[Vladimir Karputov]

Saed Modarresi :

It's great, but practically the rows, one by one of the internal arrays of the system, have been deleted.

Updating this internal array, under different conditions, costs MetaTrader5 and creates a different time delay on different computers with different system resources.

Of course, I think the new option recently added to the Settings section has somewhat hidden this problem:

"Preload chart data for open positions and orders"

However, I hope that MQL5 makers will create functions to improve and increase efficiency.

And again you forget - you are on a technical forum. Show the data of your hardware, operating system and measurement results. Please do not make frivolous accusations if you do not show technical data.

[Saed Modarresi]

Vladimir Karputov:

And again you forget - you are on a technical forum. Show the data of your hardware, operating system and measurement results. Please do not make frivolous accusations if you do not show technical data.

Although I don't think like you and my goal is to increase the efficiency of this unique platform, I accept your guidance and act within your desired framework.