How to we make a filter from a calculated field a context filter in Tableau

Question

Booking Size is a computed field with the formula:

'Small' is defined as RANK PERCENTILE(SUM(BK Total)) >= 0 AND RANK PERCENTILE(SUM(BK Total)).5.

ELSEIF RANK PERCENTILE(SUM([BK Total]) >=.5 AND RANK PERCENTILE(SUM([BK Total]) >=.5 AND RANK PERCENTILE(SUM([BK Total]) >=.5 AND RANK PERCENTILE(SUM([BK Total]) >=.5 AND RANK PER THEN 'Medium Small' (.7)

ELSEIF RANK PERCENTILE(SUM([BK Total]) >=.7 AND RANK PERCENTILE(SUM([BK Total])) AND RANK PERCENTILE(SUM([BK Total])) AND RANK PERCENTILE(SUM([BK Total])) AND RANK PERCENTILE(SUM([BK To .9 AFTER THAT, 'Medium'

ELSEIF RANK PERCENTILE(SUM([BK Total]) >=.9 AND RANK PERCENTILE(SUM([BK Total)).95 THEN 'Medium Large' is selected.

END IF 'Large' ELSE

I'd want to make this a context filter since the RANK PERCENTILE function in the preceding filter (Booking Size filter) recomputes the already filtered table if I apply any other filter on top of it.