What am I doing wrong here?
Okay I'm a relatively noob coder but im trying to replicate my manual trading strategy and automate it. In my head from a trader's perspective its so simple but im having a really hard time coding it out. Luckily I got plenty of time.
What am I doing wrong here;
import btalib class Cstdev(btalib.stddev, btalib.linearreg_slope): alias = ('STDDEV',) lines = dict(period=14, movav=btalib.linearreg_slope), params = ( ('ddof', 0), ('period', 0) ) def __init__(self): self.upper_dev1 = btalib.stddev(ddof=0.1, period=2) self.upper_dev2 = btalib.stddev(ddof=0.2, period=2) self.upper_dev3 = btalib.stddev(ddof=0.3, period=2) self.upper_dev4 = btalib.stddev(ddof=0.4, period=2) self.lower_dev1 = btalib.stddev(ddof=-0.1, period=2) self.lower_dev2 = btalib.stddev(ddof=-0.2, period=2) self.lower_dev3 = btalib.stddev(ddof=-0.3, period=2) self.lower_dev4 = btalib.stddev(ddof=-0.4, period=2)
Getting this output:
btalib.errors.InputsError: One (1) input is at least needed and 0 were provided
What I want is to create 4x "bands" using linear regression slope as the "moving average/mean" and stddev as the bands. I don't have to use these indicators if there are easier ways to implement this.
Thanks in advance!
Oh just realized that I'm not supposed to use bta-lib with backtrader, I'll go back to inhereting bt.indicators and ill use ema as a mean just so I can get started.