how to inspect the data in the datafeed

[petehe]

Hi All

I am new to backtrader. I used to build strategy with pandas and it was easy to check the data that you are back testing and verify the strategy is working correctly.

I am not sure what's the best way to inspect OHLC data in the data feeds, it is bit confusing for me.

Can someone shed some light on it?

[rajanprabu]

@petehe

I dont exactly understand your question. But backtrader had a plotting function which you can use to verify.

[run-out]

@petehe You can use this to get logging of your ohlc.

def log(self, txt, dt=None):
    """ Logging function for this strategy"""

    if self.p.printon:
        dt = dt or self.datas[1].datetime.datetime(0)
        print("%s, %s" % (dt, txt))
    else:
        pass


def print_signal(self):
    """Print to termianl ohlcv."""
    
    print(
        "{} o {} \th {} \tl {} \tc {}\tv {}".format( 
            self.datas[0].datetime.datetime(),
            self.datas[0].open[0],
            self.datas[0].high[0],
            self.datas[0].low[0],
            self.datas[0].close[0],
            self.datas[0].volume[0],
        )
    )
    
def next(self):
    
    self.print_signal()

[run-out]

@run-out I just realized looking at the code I posted that the print_signal doesn't use the log but uses its own datetime.

[petehe]

@run-out thank you very much