I developed a good strategy and i would like to know if I can trade with a demo account and set fees for my signal.
I am a student so i don't have enough money to trade with a live account :)
Why not just open a micro live account? There are numerous brokers where you can open a live account and trade for less than $10.00 USD.
If your strategy is profitable, then you should have no problem showing it works on a smaller account.
Check your private messages, I sent you some information.