highlight values in sequence based on condition in linechart

Hello Experts,

I am creating a line chart.

Consider a table having date and sales amount (on the same date). now, i want to highlight a value in line chart, if the sales are continious for 8 days, then the measure should highlight the sales amount on 8th day. (i need to ignore the data if sales are not continious for less than 8 days and next entry is blank)

is it possible to create any measure or calculated column for same.