Problem with compression on data

[dracount]

Hi,

I am loading minute data from a CSV file
e.g.

20200525 000000;0.653390;0.653440;0.653380;0.653380;0
20200525 000100;0.653390;0.653390;0.653370;0.653380;0
20200525 000200;0.653370;0.653380;0.653370;0.653370;0
20200525 000300;0.653370;0.653380;0.653370;0.653370;0

my load data looks like:

data = bt.feeds.GenericCSVData(dataname='./datas/test.csv',
                                    timeframe=bt.TimeFrame.Minutes,
                                    compression=60,
                                    dtformat=('%Y%m%d %H%M%S'),
                                    separator=';',
                                    datetime=0,
                                    open=1,
                                    high=2,
                                    low=3,
                                    close=4,
                                    volume=-1,
                                    openinterest=-1
                                    )

but it is not running in hours

e.g. output i get when showing date time in the strategy is:

2020-05-27T05:44:00
2020-05-27T05:44:00
2020-05-27T05:44:00
2020-05-27T05:44:00
2020-05-27T05:44:00
2020-05-27T05:44:00
2020-05-27T05:44:00
2020-05-27T05:44:00
2020-05-27T09:26:00
2020-05-27T09:26:00
2020-05-27T09:26:00

I don't understand what its doing?

Thanks

[vladisld]

@dracount said in Problem with compression on data:

compression=60

It seems your data is timeframe=bt.TimeFrame.Minutes and compression=1 and not 60.

If you'd like to get the 60 minutes bars you need to resample. See here: https://www.backtrader.com/docu/data-resampling/data-resampling/

[dracount]

@vladisld Thank you!

So is compression only used when resampling data? not when reading first from the csv?