Live Trading Portfolio Value Error no attribute

Getting Started with Alpaca
1

I am trying to use Alpaca Backtrader API.

My account is saying $0 cash even though I have $1000 in there.

There is an error with portfolio_value also.

            d = DataFactory(
            dataname=ticker,
            timeframe=bt.TimeFrame.Minutes,
            compression=minutes,
            backfill_start=True,
            historical=False
        )

print(cerebro.broker.cash)
print(cerebro.broker.getcash())

starting_value = ('Starting Portfolio Value: %.2f' % cerebro.broker.getvalue())

OUTPUT,

0.0
0.0
Traceback (most recent call last):
File “C:/Users/Mochi/PycharmProjects/alpaca/hammer_detect_w_alpaca_data.py”, line 513, in
starting_value = (‘Starting Portfolio Value: %.2f’ % cerebro.broker.getvalue())
File “C:\Users\Mochi\PycharmProjects\alpaca\venv\lib\site-packages\alpaca_backtrader_api\alpacabroker.py”, line 159, in getvalue
self.value = float(self.o.oapi.get_account().portfolio_value)
File “C:\Users\Mochi\PycharmProjects\alpaca\venv\lib\site-packages\alpaca_trade_api\entity.py”, line 29, in getattr
return super().getattribute(key)
AttributeError: ‘Account’ object has no attribute ‘portfolio_value’

2

Hi,
are you using your paper account or your live account?

3

I am using my Live account with ‘https://api.alpaca.markets’

4

so, what happens here is the account that is returned from the server is a null account.
my guess is that that the credentials are problematic
so

  1. make sure you are using the right credentials
  2. what are the versions of the alpaca packages you are using?
5

was using alpaca backtrader - 0.9.5, just upgraded to 0.10.1

Got the same error.

I just regenerated an API key and secret again on the Overview page, https://app.alpaca.markets/brokerage/dashboard/overview

Getting the same error.

6

I think my creds are good because when I use the same credentials with stream, I am authorized.

import websocket, json

from config import *


def on_open(ws):
    print("WEB SOCKET OPENED")
    auth_data = {
        "action": "authenticate",
        "data": {"key_id": APCA_API_KEY_ID, "secret_key": APCA_API_SECRET_KEY}
    }

# convert the python dict to json string and send to the web socket connection
ws.send(json.dumps(auth_data))


# streams can be a list of tickers
listen_msg = {"action": "listen",
              "data": {
                "streams": ["T.SPY"]}
              }

ws.send(json.dumps(listen_msg))


def on_close(ws):
    print("WEB SOCKET CLOSED")

def on_message(ws, msg):
    print("RECEIVED A WEB SOCKET MESSAGE")
    print(msg)


socket = "wss://data.alpaca.markets/stream"
ws = websocket.WebSocketApp(socket, on_open=on_open, on_message=on_message, on_close=on_close)
ws.run_forever()

Output,

WEB SOCKET OPENED
RECEIVED A WEB SOCKET MESSAGE
{“stream”:“authorization”,“data”:{“action”:“authenticate”,“status”:“authorized”}}
RECEIVED A WEB SOCKET MESSAGE
{“stream”:“listening”,“data”:{“streams”:[“T.SPY”]}}
RECEIVED A WEB SOCKET MESSAGE
{“stream”:“T.SPY”,“data”:{“ev”:“T”,“T”:“SPY”,“i”:“62879181326445”,“x”:2,“p”:335.15,“s”:100,“t”:1601504100522000000,“c”:[14,12,41],“z”:1}}

7

does the paper trading work for you with no issues?

8

yes paper trading works fine

9

The default url used is the paper account url.
do you pass the paper=False to the AlpacaStore object?

10 
IS_BACKTEST = False
IS_LIVE = True


store = Alpaca.AlpacaStore(
    key_id=config.APCA_API_KEY_ID,
    secret_key=config.APCA_API_SECRET_KEY,
    paper=IS_LIVE
)
11

ha, that was it. Setting paper=false, fixed it.

Documentation in the example is misleading,

"""
You have 3 options: 
 - backtest (IS_BACKTEST=True, IS_LIVE=False)
 - paper trade (IS_BACKTEST=False, IS_LIVE=False) 
 - live trade (IS_BACKTEST=False, IS_LIVE=True) 
"""
12

yes I changed that a week ago, maybe you had a previous example code.
I am now passing this in all examples:
paper = not IS_LIVE

1 Like
13

Thank You for the help Shlomik!

1 Like