x[-1] in init:

[traderblakeq]

Hi, - I would like to calculate a indicator, based on previous "[-1]" value:

(Line 15) - Does not work.

Any inputs ?. ( I know I still need to learn the data stucture)... learning every day :)

Thanks!

Error Stack:

[kernc]

You're looking for pd.Series.shift(). Need to keep that return value a vector (rather than the last scalar) for Strategy.I().

self.prev_wr14_sig = self.I(lambda: self.wr14.s.shift() > -50)

[traderblakeq]

Have tried .shift() - But apparantly the Strategy.I() do not have that method ?.

[traderblakeq]

This worked:

self.wr14_prev = self.I(lambda: self.wr14.s.shift() > -50)

[kernc]

Apologies. Obviously, you have to cast to pd.Series to use its API.