Efficient Frontir is not plotted after maximum

[chilango74]

Example from 2000-01 to 2024-10

https://okama.io/?tickers=MCFTR.INDX,GC.COMM,RGBITR.INDX,RUCBTRNS.INDX&ccy=RUB&first_date=2000-01&last_date=2024-10

The same EF from 2000-01 to 2024-09

https://okama.io/?tickers=MCFTR.INDX,GC.COMM,RGBITR.INDX,RUCBTRNS.INDX&ccy=RUB&first_date=2003-01&last_date=2024-9