If I added the funds to my own account how can I keep track of profits? Could I calculate the percentage of what the newly added funds are compared to my current funds? And if I need to cash out or share profits in the future, I would take that percentage of my total funds and remove them?
For example, if I currently have $10,000 and am loaned $3,000, bringing me to $13,000, could I take the percentage of the loan (23%) and multiply it by my ending balance? So,if a year later, my ending balance is $37,245, would taking 23% of this balance ($8,566) provide me with the correct amount of funds? Then take the 50/50 split profit amount ($4,283) and send it back to the loaner? Does my math seem to add up?
Trading platforms now don't limit creating an account for their traders, its good that there's a separated account for your personal trades and other trades like you've said the service you are offering that's all so you or even the other party can make sure that there's a tracking of trading progress if it's profitable or not. Another thing is why you take too much worry with the computation. You are a trader, and percentage is part of your routine. If you will do a joint trade you don't need to worry about the percentage of yours and the other party.