Filtering data from a table

I have attached a pbix file which has fund performance calculated in a variable. The matrix should just show dates from March 2015 to Oct 2018. Could someone explain how I filter the table to remove the unwanted dates from the table. I have attached a link to the pbix file 

https://formuepleje-my.sharepoint.com/:u:/g/personal/james_freeman_absalon-capital_com/EQHAkgEjE8tFrt5ihn8g04gBstLHFK1UIc1MJc1PysMc7w?e=T5ch6U