express 2 conditions in a efficient way

[hobart-liu]

Say if I try to check, trix.trix cross trix.signal and trix.trix < 0, How to write it in an efficient way.
I know I can use CrossOver(trix.trix, trix.signal), but how to add another condition, trix < 0

[backtrader]

Operator and cannot be overridden in Python, hence the need to have something specific.

trix1 = bt.ind.CrossOver(trix.trix, trix.signal)
trix2 = trix < 0
mytrixsignal = bt.And(trix1, trix2)

[hobart-liu]

thanks! so fast! :-)

[hobart-liu]

BTW, how to initialize a line with 0?

[backtrader]

That question probably needs elaboration. It seems out of context ...

Lines are not initialized. They are filled with values during next (and prenext before the warm-up period is over)