zilliq, I have similar result as swedshare as well. But long time ago,  I had some issues with my ISP, its connection were not stable, thus making back test keep resetting.

Would it be worth to do a ping with PRT server? @Nicolas, I assume even computation is done at server, but there is still constant exchange and if the latency is too long, it may slow the back test result as well?

Probably I will start to perform ping to the PRT server and see the ping statistic. Then if way too off chart, to perform tracert to see which route is causing the issue.

From my observation, there are few servers (I didn’t know what are each for and pretty sure live and demo has different servers DNS), I think PRT support could assist you on this, but maybe a first attempt can try to ping ejex.it-finance.com, see if you get better result than below (no loss packet as well):

Pinging ejex.it-finance.com [185.48.201.218] with 32 bytes of data:
Reply from 185.48.201.218: bytes=32 time=191ms TTL=53
Reply from 185.48.201.218: bytes=32 time=191ms TTL=53
Reply from 185.48.201.218: bytes=32 time=187ms TTL=53
Reply from 185.48.201.218: bytes=32 time=187ms TTL=53

Ping statistics for 185.48.201.218:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 187ms, Maximum = 191ms, Average = 189ms