How to fill value for empty date to keep continuous same period

[Anonymous]

I have a line chart and a matrix table, and want to keep the X axis align with table column header to compare data. So I have to fill values for empty date. But there is a problem. Hope someone can help. Thanks.

I have two sample data to compose two visuals:

the first table to compose line chart: sheet1:

 the second table to compose the matrix table: sheet2:

 here is the final visuals:

Here is table relationship(I also created two mapping table for date and brand in order to interact two charts together):

Based on table 1, because not every day has full data for each brand/keyword. To keep two visuals align at X axis, I created measure for line value as below:

Value_measure = CALCULATE(IF(ISBLANK(CALCULATE(SUM(Sheet1[Value]),FILTER(ALLSELECTED(Sheet1[Brand]),1=1))),0,CALCULATE(SUM(Sheet1[Value]))))

But the problem is:

Brand1 should only have keyword1,2,3; Brand2 should only have keyword 4,5,6.

But in the line chart, the "legand" shows 6 keywords if I selected Brand1 on left slicer. How should I only show filtered keywords in line chart?

The main purpose is only show last 6 days data, and compare two chart values.

Here is the sample data and PBI file:

https://pan.baidu.com/s/1fJY65WvpTVr23h9trR0ntA

Download code is "wy9h"