Hi

Moving from MT4 to JForex and the first time to use Historical Tester, I need some estimates with regard to your experience with strategy testing. Compared with MT4/MT5 Strategy tester, I noticed that testing in JForex in ticks mode takes much longer because we are testing with quality and real tick data, and this makes me feel more comfortable!

1) How big is the data downloaded by Historical Tester in average, for example, 1 year EURUSD (real ticks) ?

2) When setting up a local or cloud/remote test environment, which are the hardware requirements and best practices?

- Minimum Hard desk size
- Minimum RAM
- CPU cores (vCPU)

I will test my strategies with major currencies (multi-currency testing).

Thanks!

Simply ran a strategy over one year and then check the cache folder, you can find its location by selecting the following Tools -> Preferences -> Advanced -> Local cache path.
When using "Remote Run" you don't need to set up a test environment, because the strategy gets transferred to our remote servers and gets executed there, see more on characteristics of a remote mode from the API perspective:
https://www.dukascopy.com/wiki/#Remote_Run

Many thanks for your explanation. Still, I have a question please:

Can I backtest my strategy in Remote Run using the Historical Tester?
If yes, will the tick data be downloaded and cached on your remote servers?
If not, then I think that Remote Run is suitable only for forward testing on a ademo account, correct?

No.
"Suitable" may not be the word, rather "Designed for".

Well, then a test environment is still needed for backtesting, either on a local machine or on a VPS/Cloud machine