Shall I copy open trades?
Generally if trades are red, then yes because if green I may close manually.
I want to add additional funds, shall I close copy, add funds and recopy?
You need to judge for yourself. Generally, I would advise to just add funds and wait for new funds to be used on new trades. My trades turnover frequently. Also by closing you may or may not get a better entry?
You are not using all my copy, why?
Forget about allocation, it matters not. If I return 5% on my account per month using whatever allocation, you return the same. It is the amount on the copy that produces the return…not my allocation.