All Time Profit:

All Time Profit = Market Value + Sum of all proceeds (from sells) - Sum of all costs (from purchases)

Market Value:

Market value = Current amount of coin in your portfolio x Current price per coin

Let's take an example here of Ethereum (ETH). If I have selected GDAX as the source exchange and ETH/BTC as the source pair, BTC is the base pair here. The price per coin i.e. ETH/BTC is taken directly from the exchange.
If in USD view mode, it is converted using the same exchange's BTC/USD or BTC/USDT rate to calculate the price per coin in USD. If an exchange doesn't have a BTC/USD(T) pair, then we use the rate from
Here is how to change the source exchange and pair.

Net Cost:

Net cost = Sum of all costs (from purchases) - Sum of all proceeds (from sells)

and Net cost = 0; if sum of all proceeds > sum of all costs

Buy Price / Sell Price (price per coin for a transaction):

Price is taken as directly entered by the user in the transaction. If the price is in BTC or ETH, it is converted to USD (or fiat) using the BTC/USD(T) or ETH/USD(T) from the same exchange if it's available or the BTC/USD or ETH/USD rate from from the date and time mentioned for the transaction.

Worth and Delta (for a transaction):

Worth = Amount bought in that transaction x Current price per coin

Delta = (Worth - Cost) x 100 / Cost

Avg. Delta:

Avg. Delta = (Avg. Sell Price - Avg. Buy Price) x 100 / Avg. Buy Price

Note: Avg. Delta does not have any significance. It is simply a statistic.

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