MT5 Strategy Tester stuck during history synchronization – Build 5999

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Hello,

my MetaTrader 5 Strategy Tester suddenly stopped working correctly.

The tester stays at 0% for several minutes and often ends with messages such as:

- history synchronization interrupted
- rates base receive error
- unexpected end of testing
- no real ticks within a day
- cannot load indicator, error 4805

My terminal/agent build is 5999 and I am connected to MetaQuotes-Demo.

I tested:
- XAUUSD
- M30 and H1
- short periods such as one month
- Every tick and real ticks
- different Expert Advisors
- USD and CHF deposits
- restarting MT5 and the computer
- clearing tester/history data
- local agents

The same tests previously completed within approximately one minute, but now history synchronization can take many minutes or does not finish.

I also attempted to install another MT5 terminal but cancelled the installation. Since then, my original terminal temporarily appeared without a broker/company connection and charts stopped showing data.

Could you please help me determine whether this is related to Build 5999, the MetaQuotes-Demo history server, or corrupted terminal/history data?

I can provide screenshots and journal logs.

Thank you.
Files:
kkkkk.png  129 kb
 
Niclas Hobbins:

maybe your broker has the servers down for maintenance over the weekend? all my brokers i have done maintenance on weekend. they might be up for hours, but then down for another few hours, ie itermittent access all weekend, every weekend.
 
Michael Charles Schefe #:
maybe your broker has the servers down for maintenance over the weekend? all my brokers i have done maintenance on weekend. they might be up for hours, but then down for another few hours, ie itermittent access all weekend, every weekend.

Forum on trading, automated trading systems and testing trading strategies

MT5 Strategy Tester stuck during history synchronization – Build 5999

Niclas Hobbins, 2026.07.12 16:18

I am connected to MetaQuotes-Demo.

I have Beta Build 5998 installed, so I cannot replicate the issue. All servers are connected and active therein.

I have not received an update to Build 5999 yet.

Backtests should really be performed in a live broker-dealer's MT5 terminal/data to get an accurate backtest comparable to live trading. My broker-dealer's latest Release Build is 5836.

 
Niclas Hobbins:
Hello,

my MetaTrader 5 Strategy Tester suddenly stopped working correctly.

The tester stays at 0% for several minutes and often ends with messages such as:

- history synchronization interrupted
- rates base receive error
- unexpected end of testing
- no real ticks within a day
- cannot load indicator, error 4805

My terminal/agent build is 5999 and I am connected to MetaQuotes-Demo.

I tested:
- XAUUSD
- M30 and H1
- short periods such as one month
- Every tick and real ticks
- different Expert Advisors
- USD and CHF deposits
- restarting MT5 and the computer
- clearing tester/history data
- local agents

The same tests previously completed within approximately one minute, but now history synchronization can take many minutes or does not finish.

I also attempted to install another MT5 terminal but cancelled the installation. Since then, my original terminal temporarily appeared without a broker/company connection and charts stopped showing data.

Could you please help me determine whether this is related to Build 5999, the MetaQuotes-Demo history server, or corrupted terminal/history data?

I can provide screenshots and journal logs.

Thank you.

Restart MT5, try again and provide the Journal log and Tester log. (the files, not pictures).

 
poor data or vpn use maybe
 

Hello, I found two more details that may help diagnose the problem.

First, when I run the exact same test again without changing any settings, the actual backtest takes only a few seconds, but history synchronization takes about 9 minutes every time.

Journal:
Environment synchronized in 0:09:00.440
total time from login to stop testing 0:09:21.704

Second, today is August 23, 2026, but the MetaQuotes-Demo server only synchronizes XAUUSD history and real ticks up to May 22, 2026:

XAUUSD: history synchronized from 2004.06.11 to 2026.05.22
XAUUSD: history ticks synchronized from 2019.01.02 to 2026.05.22

Therefore, if I select a test period ending in August 2026, the test effectively stops around May 22 because there are no newer real ticks available.

Is it normal that MetaQuotes-Demo currently has no XAUUSD history/real ticks after May 22, 2026?
And is the repeated ~9-minute history synchronization on every test expected, or is there a way to fix it?

Thank you.

 
Niclas Hobbins #:

Hello, I found two more details that may help diagnose the problem.

First, when I run the exact same test again without changing any settings, the actual backtest takes only a few seconds, but history synchronization takes about 9 minutes every time.

Journal:
Environment synchronized in 0:09:00.440
total time from login to stop testing 0:09:21.704

Second, today is August 23, 2026, but the MetaQuotes-Demo server only synchronizes XAUUSD history and real ticks up to May 22, 2026:

XAUUSD: history synchronized from 2004.06.11 to 2026.05.22
XAUUSD: history ticks synchronized from 2019.01.02 to 2026.05.22

Therefore, if I select a test period ending in August 2026, the test effectively stops around May 22 because there are no newer real ticks available.

Is it normal that MetaQuotes-Demo currently has no XAUUSD history/real ticks after May 22, 2026?
And is the repeated ~9-minute history synchronization on every test expected, or is there a way to fix it?

Thank you.

MetaQuotes-Demo is a testing server and should never be used as a stable and reliable working server.

Use a demo account on a broker.

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