Posts made by SPECULARI FUND

@vladisld WAS CONFUSED BY FOREX DATA FEED. YOU'RE RIGHT.

@rluc99 said in Starting with Interactive Brokers (IB) - no data feed:

I have discovered the problem. It is not related to Backtrader.

I did some digging around on the IB website. It seems that the IB demo account does not allow historical bars through the API for anything other than FOREX. The same applies to paper trading or live accounts unless there is a subscription to the relevant market data feed. If there is a subscription in place then the historical bars are available at any time, including week-ends.
(As an aside, historical bars are constructed by TWS regardless of whether there is a subscription in place or not.)
Delayed data is available during market hours for accounts without market data subscription, but to obtain this data a flag has to be set in the API. I don't think Backtrader allows the user to set this flag but I have not investigated this in detail.

Most of the above information comes from the following two links:
http://interactivebrokers.github.io/tws-api/market_data.html
http://interactivebrokers.github.io/tws-api/historical_data.html

So, it's not possible to get even delayed stock data from IB using Backtrader for not funded account right?

Looks like not possible to get delayed stocks data with a paper not funded account from IB. I am right?

@Xavier-Escudero said in Crossover + MACD error:

@SPECULARI-FUND I've the same problem. Have you any solution?

I used raw data from the API to this library.

Is it possible to use delayed data from IB (I mean paper, but not FOREX market) as a "live" strategy?
next() will be called if data is delayed? Maybe my question is stupid, just try to understand the logic. Thanks!

self.macd = btalib.macd(self.get_data_bars(self.symbol, '1Min')[self.symbol], pfast=self.params.macdfast, pslow=self.params.macdslow, psignal=self.params.macdsignal)

self.macdX = btalib.crossover(self.macd.macd, self.macd.signal)
print(self.macd.df)

                     
time      macd    signal  histogram


2020-10-19 11:37:00-04:00       NaN       NaN        NaN
2020-10-19 11:38:00-04:00       NaN       NaN        NaN
2020-10-19 11:39:00-04:00       NaN       NaN        NaN
2020-10-19 11:40:00-04:00       NaN       NaN        NaN
2020-10-19 11:41:00-04:00       NaN       NaN        NaN
...                             ...       ...        ...
2020-10-19 14:52:00-04:00 -0.248898 -0.304889   0.055992
2020-10-19 14:53:00-04:00 -0.252423 -0.298331   0.045908
2020-10-19 14:54:00-04:00 -0.225212 -0.289191   0.063979
2020-10-19 14:55:00-04:00 -0.164539 -0.273610   0.109071
2020-10-19 14:56:00-04:00 -0.086874 -0.250268   0.163394

Error:

UserWarning: evaluating in Python space because the '-' operator is not supported by numexpr for the bool dtype, use '^' instead
  f"evaluating in Python space because the {repr(op_str)} "

What I am doing wrong?

   DataFactory = store.getdata 
   data = DataFactory(
        dataname=ticker,
        tz=timezone,
        timeframe=bt.TimeFrame.Minutes,
        compression=1,
        fromdate=pd.Timestamp(args.start),
        sessionstart=datetime.time(9, 30),
        sessionend=datetime.time(16, 00),
        historical=True)

I am using such parameters to backtest on history some simple strategy and I see that it runs from right date fromdate, but then after 1month of period, it skips all dates range and jump to the current last date. Any idea why this happens?

@orenshkol @vladisld why when I am using with resample data instead adddata, strategy runs on the first symbol only?

May be you can help how check type of order that accepted? Because I am updating take profit Limit order by moving average price and every updating of price I receiving new Limit order - previous not replaced.

I understand that this is not bug by backtrader, but anyway maybe someone had the same.

When stock is hold by exchange or sometimes after overnight I see that type of error. How I can catch this?

File "/home/x777/anaconda3/envs/env_backtrader/lib/python3.6/site-packages/backtrader/cerebro.py", line 1130, in run
    runstrat = self.runstrategies(iterstrat)
  File "/home/x777/anaconda3/envs/env_backtrader/lib/python3.6/site-packages/backtrader/cerebro.py", line 1301, in runstrategies
    self._runnext(runstrats)
  File "/home/x777/anaconda3/envs/env_backtrader/lib/python3.6/site-packages/backtrader/cerebro.py", line 1545, in _runnext
    drets.append(d.next(ticks=False))
  File "/home/x777/anaconda3/envs/env_backtrader/lib/python3.6/site-packages/backtrader/feed.py", line 407, in next
    ret = self.load()
  File "/home/x777/anaconda3/envs/env_backtrader/lib/python3.6/site-packages/backtrader/feed.py", line 479, in load
    _loadret = self._load()
  File "/home/x777/anaconda3/envs/env_backtrader/lib/python3.6/site-packages/alpaca_backtrader_api/alpacadata.py", line 301, in _load
    ret = self._load_tick(msg)
  File "/home/x777/anaconda3/envs/env_backtrader/lib/python3.6/site-packages/alpaca_backtrader_api/alpacadata.py", line 401, in _load_tick
    msg['bidprice'])
KeyError: 'bidprice'

@Ronan-Dunham do you have experience with Alpaca API?

@ab_trader all my questions about orders event handling. But I understand that if I had broker terminal I wasn't confused with logs output and next(). Anyway, thank you for replies!

@ab_trader how to check what minimal timeframe data feed can send?

@Yaroslav-Horyslavets thx for reply. Looks like I can't understand it because I test it without broker platfrom (only live feed) and my logs show after each "next()".

Last 2 days I am testing live data feed. I noticed, that first resample timeframe is major for "next(self):" function. right?
So, if all logic calculates inside of this "loop" it will calculates at the same "speed" as your major timeframe, right?
My major resample timeframe is 1 minute, and when I receive signal my order create and it executes after 1 minute...or I am wrong? On backtesting I didn't understant this moment untill try live data, so looking for asnwer from experienced guys. Thx!

@vladisld thank you for reply. Yes, I was asking about internal timezone for live data feed. So, you need add "tz" argument to Datafactory(tz=timezone). But if you want show in logs same timezone, need add to cerebro.run():

timezone = pytz.timezone("US/Eastern")
cerebro.run(tz=timezone)

With last param I was confused because in logs I saw right timezone, but data feed has different (UTC).

My data feed time in UNIX time 1588157340000 in milliseconds.
Using this site - https://www.epochconverter.com/ I see that this is GMT timezone. How convert to US/Eastern? It's possible?

timezone = pytz.timezone("US/Eastern")
cerebro.run()

This code change timezone for logs, but not for data feed.

2020-05-04, 22:03:35, Price 1.37
2020-05-04, 22:03:37, Price 1.38
2020-05-04, 22:03:40, Price 1.38
2020-05-04, 22:03:49, Price 1.38
2020-05-04, 22:03:51, Price 1.38
2020-05-04, 22:04:01, Price 1.37
2020-05-04, 22:04:03, Price 1.37
2020-05-04, 22:04:04, Price 1.37
2020-05-04, 22:04:05, Price 1.37
2020-05-04, 22:04:06, Price 1.37
2020-05-04, 22:04:08, Price 1.37
2020-05-04, 22:04:09, Price 1.37
2020-05-04, 22:04:13, Price 1.37
2020-05-04, 22:04:18, Price 1.37
2020-05-04, 22:04:21, Price 1.37
2020-05-04, 22:04:23, Price 1.37
2020-05-04, 22:04:24, Price 1.38
2020-05-04, 22:04:25, Price 1.38
2020-05-04, 22:04:40, Price 1.38
2020-05-04, 22:04:44, Price 1.38
2020-05-04, 22:04:54, Price 1.38
2020-05-04, 22:04:56, Price 1.38
2020-05-04, 22:04:58, Price 1.38
Traceback (most recent call last):
"/home/x777/anaconda3/envs/env_backtrader/lib/python3.6/site-packages/backtrader/cerebro.py", line 1130, in run
    runstrat = self.runstrategies(iterstrat)
  File "/home/x777/anaconda3/envs/env_backtrader/lib/python3.6/site-packages/backtrader/cerebro.py", line 1301, in runstrategies
    self._runnext(runstrats)
  File "/home/x777/anaconda3/envs/env_backtrader/lib/python3.6/site-packages/backtrader/cerebro.py", line 1560, in _runnext
    dt0 = min((d for i, d in enumerate(dts)
ValueError: min() arg is an empty sequence

After random time of running script falling. I saw similar error on forum, but not clear understand why it happens. Can anybody explain me? Thanks!

It's possible to hide "Meta" tab? Also, how add another datas (timeframes) below main? Thx!

@Devination Hi, I tried few days ago Alpaca and looks like withou funding account it's impossible to test it even for paper account. Maybe you know similiar services that could work with backtrader?