Interactive Brokers historical data error when resampling into daily bars.

sullyai

I have been working with backtrader for a while now and I love the platform but I have just recently started working with Interactive brokers and backtrader. I have found that the data feed seems to get stuck whenever I resample into daily bars. I have 5, 15, and 60 minute data and I am trying to add daily resampling. However, when I add the resample line, my script seems to get through a few bars, then just stops working and I have to close my terminal altogether. When the daily resample is removed, it works like a dream. I have also tried making separate requests for intraday and daily bars but when I do that, I get the data notification then the error in the dt0 = min(dt0 for dt0 in enumerate(dts)), min() is an empty argument.

My code for resmapling:

datakwargs = dict(dataname = epic, 
                              historical = historical, 
                              latethrough = False, 
                              fromdate = dt.datetime.strptime(fromdate, '%Y-%m-%d'),
                              qcheck = 0.5)
            
data = IBDatafactory(**datakwargs)
                                  
cerebro.resampledata(data,  timeframe = bt.TimeFrame.Minutes, compression = interval)
cerebro.resampledata(data,  timeframe = bt.TimeFrame.Minutes, compression = 15)
cerebro.resampledata(data,  timeframe = bt.TimeFrame.Minutes, compression = 60)
cerebro.resampledata(data,  timeframe = bt.TimeFrame.Days, compression = 1)

Please let me know if I am an idiot or if there is something wrong in the system. Also, the code is inside of a function, but I have attached what is pertinent.

Thank you so much!

bigdavediode

@sullyai Couple of points that may or may not be useful: resampledata is done in-place so you are resampling four times in-place above. Ie. if your "day" has a half an hour bar during the real time hours, then you may get stuck resampling from 60 minutes to 1 day. Resample from 1 minute to daily instead.

Another thought is that your source data may be missing some bars due to it not being traded. For example, at the 4:00pm bar there may not be a "tick" yet so it may be missing and thus cannot be resampled. Especially with ibdata which isn't real tick data.

sullyai

Thank you so much! I changed the datakwargs from:

datakwargs = dict(dataname = epic, 
                              historical = historical, 
                              latethrough = False, 
                              fromdate = dt.datetime.strptime(fromdate, '%Y-%m-%d'),
                              qcheck = 0.5)

to this:

datakwargs = dict(dataname = epic, 
                              timeframe = bt.TimeFrame.Minutes,
                              historical = historical, 
                              latethrough = False, 
                              fromdate = dt.datetime.strptime(fromdate, '%Y-%m-%d'),
                              qcheck = 0.5)

with the obvious import of

import backtrader as bt

Thank you again!