DOC Add zipline > 0.7 requirement.
DOC Add zipline > 0.7 requirement.

quantopian/pyfolio,femtotrader/pyfolio,chayapan/pyfolio,YihaoLu/pyfolio,ChinaQuants/pyfolio,YihaoLu/pyfolio,quantopian/pyfolio,ChinaQuants/pyfolio,femtotrader/pyfolio