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
comparing your current balance to yesterday's balance.
"""
# First, open the API connection
api = tradeapi.REST(
'your_api_key_here',
'your_api_secret_here',
'https://paper-api.alpaca.markets'
)
# Get account info
account = api.get_account()
# Check our current balance vs. our balance at the last market close
balance_change = float(account.equity) - float(account.last_equity)
print(f'Today\'s portfolio balance change: ${balance_change}')
You can view the full example in C# and python on our documentation site.