Thanks for reply. Yes that makes sense now.
I have another questions if you will oblige me. I started with 75 dollars and I have been experimenting with different trading strategies. I feel that it is not easy to know exactly how much money I have made or lost. My portfolio was at 80 dollars yesterday and I thought I had made 5 dollars with my trades. Today I am down to 68 dollars. Then I realized that my portfolio value goes up and down based on the market. Then I wondered how I can know how much money I have made or lost with my trades. I can see how much I have spent in fees, only $1.03. I can see my trade history. I can see that on March 24th I sold 0.00110000 BTC at $6,599.29, but I don't know how much money I bought it for, so I don't know the profit on my transaction.