CREATE TABLE table_52412 ("Position" FLOAT, "Club" TEXT, "Played" FLOAT, "Points" TEXT, "Wins" FLOAT, "Draws" FLOAT, "Losses" FLOAT, "Goals for" FLOAT, "Goals against" FLOAT, "Goal Difference" FLOAT)

What was the biggest draws, for wins under 4, and points of 20-18?
SELECT MAX("Draws") FROM table_52412 WHERE "Points" = '20-18' AND "Wins" < '4'
SELECT MAX("Draws") FROM "table_52412" WHERE "Points" = '20-18' AND "Wins" < '4'