Show count of order for last 30 days

[beskqlik]

Hi 

i am trying to get count of orders for last 30 days. When  using belwo expression, i am getting zero.DATA_DATE , formatting is also taken care of the expression.

Count({$<DATA_DATE={">=$(=Date(max(DATA_DATE)-30, 'DD-MMM-YY'))"}>}order)

[beskqlik]

i have 'data_date1' date column as a filter