Hello AndrewAMD, thank you for the answer - all clear. Actually the Phantom trading mode is what I am doing currently. Writing my own "Z9" script is for sure my future plan.

Back to the DdlV issue of "DEMO" trading Z9. In my opinion, there is not much sense of DEMO trading Z9 in either way.

Z9 is just a buy and hold strategy with specific portfolio rotation. The performance and the risk of the strategy is clear from backtesting.