Developing a Graph Visual which shows the Trend of data in a bar chart with trend line

[SJ301120]

Hi experts ,

I have a doubt while developing a visual , i want to see a column chart visual which has data in the below format .
X-Axis having week information
Y Axis which has the count of items sold till that date 

For example - assume a small mini mart which sells stationery , i want to see the graph as x axis having week number in that year, and y axis has the number of boxes of paper sold .

if 3 boxes are sold in week 1 the week 1 column in the chart should show 3 and the next week 5 are sold . for 2nd week we should have the column data as 8 in the column chart so on likewise . any help is much appreciated . Thanks in Advance .

[speedramps · Accepted solution]

This is commion question 

Click here to download a solution 

How it works:

Firstly create  calendar table

Learn about power Bi calendars here 

In my example I have added 

Week ending =

// get week ending on sunday date

'Calendar'[Date] - WEEKDAY('Calendar'[Date],2) +7

Then add dax masures for ..

Total sales = SUM(Sales[Sales])

Cumulative sales =

VAR mymindate = MIN('Calendar'[Date])

VAR mymaxdate = MAX('Calendar'[Date])

VAR today = TODAY()

RETURN

IF(mymindate > today, BLANK(),

CALCULATE(

    [Total sales],

    'Calendar'[Date] <= mymaxdate

))

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