Legend best position

Hi all,

I'm doing a lot of plots and all of them should have a legend. The
problem is that this legend not always have to be in the same place,
because some plots can override the legend box. I'm wondering if there
exist a command that "optimally" allocate the legend position, I'm
refer to a MATLAB's command'slegend and it's option "Best". Exist?
What is?

Bests regards

CdeB