I'm just starting out in swing trading, and I'm facing a somewhat nagging doubt. Since last January I executed 27 trades, with varying results. I am tracking down the percent return on each trade along with a bunch of other parameters, such as the trade cost, commissions, entry and exit price, entry and exit date etc.
My question is this: how in the world can I calculate, by the end of this year, my yearly percent return of my trading activity? I cannot figure out what the base capital should be, since it varies with time. I started with a certain sum but I kept adding some every now and then from my bank account...any help?