Alpaca API's endpoints can be used to calculate the daily profit/loss of your portfolio. Please visit this thread at the Alpaca forum to get more information.

Example on viewing gain/loss of your portfolio
You can use the information from the account endpoint to do things like calculating the daily profit or loss of your account. Example in python: import alpaca_trade_api as tradeapi if __name__ == ‘__main__’: ”″” With the Alpaca API, you can check on your daily profit or loss by compar…