Self.I problem?

[hz7451]

I have a RSI indicator inside def init(self) and print out result like this [nan 100 48 20 18 16 13 12 46 54]. If i do not add RSI indicator, the def next() will perform "normally" which will start from the third candle and so on. Once I added RSI, the def next() will start from forth candle maybe due to the first RSI data "nan" ? I am not sure . Can I add RSI indicator at the same time the def next() works as normal and start from the third candle?

[kernc]

maybe due to the first RSI data "nan" ?

Exactly. Just fill the nan with some value, e.g.:

def RSI(*args):
    rsi = _RSI(*args)
    return pd.Series(rsi).fillna(method='backfill')