average for each day

How to calculate the average of a range day by day? A is the column for the day, and the average should go at the top of each day. I’ve done the countif but it brings results in every cell other than at the top of each day;


=IF(COUNTIF(A2192:A2192,A2192)=1,AVERAGE(BJ2193:$BJ$10000))

Many thanks

How about this array formula

=AVERAGE(IF(A2193:$A$10000=A219,BJ2193:$BJ$10000))