A really dumb question that I can somehow not find the answer to

kfue

I'm building a list in my init of my strategy like so

for d in self.datas:
            self.stoch_lst.append(bt.ind.Stochastic(d, period=14, period_dfast=3, safediv=True))

Really simple and it's working.

Then in my next how do I get the d period? I'm accessing the k value like so

self.stoch_lst[i][0]

and then using it without getting the 0 index for comparisons, but how would I get the d value from the stochastic? Or any other indicator that produces more than one line.

I'm sure this is really simple but I can't find it on the docs and my google searches have came up empty somehow.
Thanks.

techydoc

@kfue here is a code snippet based on what I use to add multiple indicators to a list of stocks.

import backtrader as bt
import collections

class St(bt.Strategy):
    def __init__(self):

        # to hold the indicators
        self.inds = collections.defaultdict(dict) 

       # Iterate over datafeeds and add any indicators for each datafeed
        for d in self.datas:
           # Add an indicator and use a string to name which indicator
            self.inds[d]['stoch'] = bt.ind.Stochastic(d, period=14, period_dfast=3, safediv=True)
            # You can add mutiple indicators to a datafeed
            self.inds[d]['movav'] = bt.ind.SMA(d, period=28)
    
        # to get the period for the stochastic indicator
        print(self.inds[self.data0]['stoch'].p.period)

data = bt.feeds.BacktraderCSVData(dataname='./data/yourdata.csv')

cerebro = bt.Cerebro()
cerebro.adddata(data)

cerebro.addstrategy(St)
cerebro.run()

techydoc

@kfue I think for you example instead of

self.stoch_list[i][0]

you could use

self.stoch_list{i].p.period

techydoc

@techydoc typo you { brackets should all be []

(sux you cannot edit posts)

kfue

@techydoc That's almost what I want. In the stochastic it should contain a "slowD" and a "slowK" or something of that nature. A d and a k value. The k is the default, how do I get the k.

Also, is this documented somewhere? There's this documentation but it doesn't contain any details of what these objects actually contain which is very frustrating. https://www.backtrader.com/docu/indautoref/

ab_trader

@kfue yep, it is documented exactly by the reference you have in your post. Stochastic has two lines percD and percK, which keeps the values the same way like data has lines open, close etc. And can be accessed the same way.

run-out

@kfue said in A really dumb question that I can somehow not find the answer to:

Also, is this documented somewhere? There's this documentation but it doesn't contain any details of what these objects actually contain which is very frustrating. https://www.backtrader.com/docu/indautoref/

It pretty well documented here. https://www.backtrader.com/docu/indautoref/#stochastic