Re: Cumulative/Running mean implementation
I think,you can creat an indicator by yourself. you can find the example in the blog or document about backtrader

Ok,you are right. OrderedDict's update method can accept tuple。I am very sorry.

from collections import OrderedDict
o=OrderedDict()
o.update((('name',"yun"),('age',30)))
print(o)

can you answer my question about the classmethod you used in this class ? obase._getpairs() get a empty OrderedDict,is it right?

class DataAccessor(LineIterator):
    
    PriceClose = DataSeries.Close
    PriceLow = DataSeries.Low
    PriceHigh = DataSeries.High
    PriceOpen = DataSeries.Open
    PriceVolume = DataSeries.Volume
    PriceOpenInterest = DataSeries.OpenInterest  # modify the  PriceOpenInteres to PriceOpenInterest
    PriceDateTime = DataSeries.DateTime

ok, I search for the PriceOpenInteres in backtrader on vscode,it just emerge once in this class,so maybe any name can be used here,but I think PriceOpenInterest may be more pretty.

def _derive(cls, name, info, otherbases, recurse=False):
        '''推测各个参数的意义：
        cls:代表一个具体的类，很有可能就是AutoInfoClass本身
        info:代表参数（parameter)
        otherBases:其他的bases
        recurse:递归
        '''
        # collect the 3 set of infos
        # info = OrderedDict(info)
        baseinfo = cls._getpairs().copy()   # 浅拷贝，保证一级目录下不改变
        obasesinfo = OrderedDict()          # 代表其他类的info
        for obase in otherbases:
            ### 如果是tuple,python3的情况下orderedDict似乎不能够直接用update,会报错
            **if isinstance(obase, (tuple, dict)):**
                obasesinfo.update(obase)
            ### 如果定义_getpairs()是为了获取空的有序字典的话，下面似乎没有意义
            else:
                obasesinfo.update(obase._getpairs())

you know OrderedDict.update(something),if something is a tuple,it will raise a error in python3.
so, I think ,the right code may be if isinstance(obase, (list, dict)).

My question is :

I can't understand the the three line in this class,but,after a lot of serch and try,I guess:

_getpairsbase = classmethod(lambda cls: OrderedDict())
_getpairs = classmethod(lambda cls: OrderedDict())
_getrecurse = classmethod(lambda cls: False)

It equals:

@classmethod
    def _getpairsbase(cls)
        return OrderedDict()
        
    @classmethod
    def _getpairs(cls)
        return OrderedDict()
        
    @classmethod
    def _getrecurse(cls)
        return False

Is it right?

if so,maybe,there are some code appearing redundant, for example:

if isinstance(obase, (tuple, dict)):
    obasesinfo.update(obase)
        
else:
    obasesinfo.update(obase._getpairs())

update an empty OrderedDict ,may add nothing.

thank you very much. Look forward to seeing backtrader becoming better and better!

class AutoDict(dict):
    
    _closed = False

    def _close(self):
        self._closed = True
        for key, val in self.items():
            if isinstance(val, (AutoDict, AutoOrderedDict)):
                val._close()

    def _open(self):
        self._closed = False

    def __missing__(self, key):
        
        if self._closed:
            raise KeyError

        value = self[key] = AutoDict()
        return value

    def __getattr__(self, key):
        
        if False and key.startswith('_'):
            raise AttributeError

        return self[key]

    def __setattr__(self, key, value):
        
        if False and key.startswith('_'):
            self.__dict__[key] = value
            return

        self[key] = value

your code about : if False and some_code: do something
I think ,it will never run do something.

mybe you just want write this code.
mybe,you should replace "False" with "self._closed", I guess.

I have used backtrader for more than one year to backtest my strategy, I also find many errors, so,I have to read the source code,to understand backtrader's framework and details.

Anyway, thank you！

ok,thank you very much

can trading calendar achieve my target?

can I use the function add_timer to solve this problem?
self.add_timer(
when=self.p.when,
offset=self.p.offset,
repeat=self.p.repeat,
weekdays=self.p.weekdays,
weekcarry=self.p.weekcarry,
monthdays=self.p.monthdays,
monthcarry=self.p.monthcarry,
# tzdata=self.data0）

Dear:
now our company use backtrader and backtrader-btoandav20 to trade in oanda, if no holidays or weekends,our strategy can run all the time.
But,after the holiday or weekend,our strategy will also run,but it stucks,and never go to the new next.
I read the backtrader-doc,Trading Calendar,and the theme about live trading in the forum，but,I dont find this similar question.
can you tell me the ways of running the strategy all the time before the holiday and after the holiday? Thank you very much!

I use notebook as the environment to research.so the python-kernel hijacking environment is jupyter notebook.After carefully consideration,I think,maybe we can use mongodb or mysql as database to store the data and get the data needed from the database,this may slow the speed,but I think,it can save a lot of memory.
By the way,after SIX hours runs, it has'nt go into the 'next', I will give up ,and develop the framework by myself!