So lets say I put in $100 dollars. I buy while its at a low of $10,400. The price goes up to $10,400 and I sell. Whata my profit?
You invested $100 and lets say you sold it and finally got $130. So 30$ is your profit. If you are not selling and want to calculate the profit currently you are in then you check what is the current value of your investment minus the fee you'll pay for trading. Thats your profit.