TradeLog records transactions much like a simple checkbook register would. Each trade transaction is listed as either a debit or a credit:
When you purchase an equity, money flows out of your account or is debited. TradeLog lists all purchase transactions as a negative amount.
When you sell an equity, money flows back into your account. TradeLog lists all sales transactions as a positive amount.
The difference between the sales amount and the purchase amount is your profit or loss.
This simple concept is the basis for all TradeLog calculations.
Continue to Concept #2: Open a Trade, Close a Trade