cerebro.addbroker()?

kav

Hi all,

I have created a custom broker by modifying a couple of functions from
/backtrader/brokers/bbroker.py
(calling the new file mybbroker.py and putting it in my own code directory, -- not in the same folder as the original bbroker.py).

Now my question is: how can I call this one to be used instead?

I tried to add a line

import mybroker

on top of the code, and though the import happens, it's still the original broker that gets used when I do:

import backtrader
import mybroker

cerebro   = backtrader.Cerebro(maxcpus = 1)
cerebro.addobserver(backtrader.observers.Broker)
cerebro.addstrategy(StrategyBaseTradingplusplus)        
data      = PandasDataStrat1(dataname     = dataframe, 
                                     datetime     = -1, 
                                     open         = -1, 
                                     high         = -1, 
                                     low          = -1, 
                                     close        = -1,
                                     volume       = -1,
                                     openinterest = None)
cerebro.adddata(data)
        
cerebro.broker.setcash(100000.0)
cerebro.broker.setcommission(commission = 0.2, 
                              margin     = 1000.0, 
                              mult       = 100.0)
cerebro.broker.set_filler(backtrader.broker.filler.FixedBarPerc(perc = 100.0))
               
cerebro.run()

So my question is: How to use my custom broker?

momentum

cerebro.setbroker(<instance of your broker class>)

backtrader

Why don't you use what's already documented?

Example: Docs - Live Trading - Oanda v1.0

The Cerebro reference says what setbroker does (can also be reached via the broker property): Docs - Cerebro

kav

Thanks, worked like a charm. As usual, thank you for the prompt answer and the references;)