Hi! I am creating a service for calculating the profitability of a trader’s trade.
I need to calculate the profitability on historical data, and if it seems clear for the spot:
we take all deposits / withdraws, buy and sell orders and consider that we entered 1 BTC, bought 10 ETH, then sold for EOC, I can get a historical ticker for EOC in BTC and understand how much was spent and received. BTC is at this level, but how do you deal with margin trading?