Candlestick Strategy: Indicator, Datafeed, or Parameter Issue?

GregFekas

Hello everyone,
I am new to backtrader and first time poster here. I want to create a strategy based on candlestick patterns. My strategy looks for all the possible candlestick patterns, but i find and calculate this outside of the strategy class. I am not sure how to handle this issue. Is it a 'custom' indicator issue? Is it an extended datafeed issue (PandasData or something like that)? Can i pass a pandas.Series as a strategy parameter (i pretty sure i can't)? My best bet was this , but i my application asks from the user for inputs so overloading it with CSV files, well.. it did not seem right. Also i could not make it work.

Here is my code:

import pandas_ta as ta
import backtrader as bt
import yfinance as yf
import pandas as pd
from datetime import date,timedelta


YESTERDAY=date.today()-timedelta(days=1) 
ONEYEARAGO=YESTERDAY - timedelta(days=365)
TICKER = 'tsla'


df = pd.DataFrame()
df = yf.download(TICKER,start=ONEYEARAGO , end=YESTERDAY)
candle_df= df.ta.cdl_pattern(name='all') #look for candlestick patterns
for col in candle_df.columns:
    if (candle_df[col]==0).all():             #if you dont find a pattern drop it
        candle_df.drop(col,axis=1,inplace=True)

candle_df["sum"] = candle_df.sum(axis=1)    #for the patterns found create the sum of them
df['sum'] = candle_df['sum']

cerebro = bt.Cerebro()
cerebro.adddata(df)# Here my code breaks
#AttributeError: 'DataFrame' object has no attribute 'setenvironment'#

cerebro.addstrategy(AllCandles,sum=df['sum']) # This will never work but...
cerebro.run()
cerebro.plot()

#
class AllCandles(bt.Strategy):

    params = dict(sum) #I am not sure to access the sum of candles

    def __init__(self):
        signal = self.p.sum[0]  #but i want achieve this

    def next(self):
        if not self.position:
            if self.signal > 0:
                self.buy()
        else:
            if self.signal < 0:
                self.sell()

I looked around the forum i did not find anyone with a similar issue. I hope it's something cause on my luck of experience. Any help?

P.S I am not sure how to tittle the topic either...