Unfortunately I cannot upload files due server error of this forum ( see
https://www.dukascopy.com/swiss/english ... 77&t=57339 )
But for replication you could simply take a strategy like this
https://www.dukascopy.com/strategyconte ... trader=sos (June 2020)
and run it in the Historical Tester on GBP/USD of a local JForex.
Switch on Visual Mode.
Back test it in full speed.
Then switch between high periods and low periods a few times while it is running.
After a few switches you will see the chart not updating and sometimes freezing.
The more complex a strategy gets the more easy this happens.
Please have a look at this.