I have a few friends who are willing me to manage their trading account for fees and profit sharing. I would like to know that how can it be done legally without me getting into any legal issues in future. I consulted my CA and he asked me to get a power of attorney from them to manage their account. So in case of any issue which may arise in future for any reason, I will be legally safe and can produce the power of attorney to any govt authority or court if needed. I would like to know if this is the right way of getting into this arrangement or is there any other arrangement which I need to get into to put me not wrong legally.