MIN Refactor gross_lev plot.
MIN Refactor gross_lev plot.

r0k3/pyfolio,ChinaQuants/pyfolio,femtotrader/pyfolio,femtotrader/pyfolio,quantopian/pyfolio,chayapan/pyfolio,quantopian/pyfolio,sketchytechky/pyfolio,r0k3/pyfolio,dursk/pyfolio,raybuhr/pyfolio,YihaoLu/pyfolio,YihaoLu/pyfolio,raybuhr/pyfolio,dursk/pyfolio,ChinaQuants/pyfolio,yanheven/pyfolio,sketchytechky/pyfolio,yanheven/pyfolio