plot_frontier_area for more stocks and better clarity

[BradKML]

For fun, there are 39 or so stocks that are persistent in at least the last 10 years, and that are of concern for certain consumer demographics.

# Tickers of long-term $BECKY assets
assets = ["AAPL", "ADDYY", "AMZN", "BBBY", "BBWI", "BUD", "CHD", 
          "CMG", "CVS", "DECK", "DEO", "DIS", "EL", "F", "FIZZ", 
          "GPS", "JWN", "LRLCY", "LULU", "LVMUY", "M",  "MO", "MTCH", 
          "NFLX", "NKE", "PVH", "RL", "SBUX", "STZ", "TAP", "TGT", 
          "TJX", "TPR", "UAA", "ULTA", "VFC", "WSM", "WWW", "YUM"]
# Contemporary $BECKY companies
contemp = ["ABBV", "COTY", "CRON", "EOLS", "ETSY", "FTCH", "GOOS", 
           "INMD", "LEVI", "LYFT", "MC", "META", "OR", "PINS", "PLNT", 
           "PTON", "SFIX", "SKIN", "SNAP", "SPOT", "TLRY",  "YETI"]

If plot_frontier_area is made from this, often times the items on the left side are squished, so that the information in the middle and the right side cannot be deduced clearly. It cycles through 20 tickers, which in this example means that each color is used by two tickers.

Is it possible to make the middle more visible, merely by splitting the graph between low risk and high risk visualizations instead of upping the resolution?