Tracking Product wise price change

[schrodinger]

This is what the data looks like. Now, the problem statement is, I need to find the dates at which each product's price changed. This data keeps on updating on daily basis. I already have a slicer on my dashboard that allows me to select a product by Item ID.  So, if i select Item id 112 and from the price change slicer, I select True, it should give me the following output.

SO basically, I want to add a new column with boolean values (True/False), which shows True, if there is a cost change as compared to the previous cost and false if it is the same as the previous cost.

Price Change = IF(FILTER(Sheet1, Sheet1[Item ID]=EARLIER(Sheet1[Item ID]) && Sheet1[Rank]=EARLIER(Sheet1[Rank])+1 && Sheet1[Cost]<>EARLIER(Sheet1[Cost])),TRUE,FALSE)

I used this, but it's giving me an error 

[schrodinger]

Thank you everyone! 

[rohit_singh]

Hi @schrodinger ,

You can try something like this :

Price Change =

var _cost = max(Parts[Cost])

var _dt = max(Parts[Date])

var _prevdt =

CALCULATE(

max(Parts[Date]),

FILTER(

ALLEXCEPT(Parts, Parts[Part Number],Parts[Item ID]),

Parts[Date] < _dt

)

)

var _prevcost =

CALCULATE(

max(Parts[Cost]),

FILTER(

ALLEXCEPT(Parts, Parts[Part Number],Parts[Item ID]),

Parts[Date] = _prevdt

)

)

Return

if(_cost = _prevcost , "False", "True")

Kind regards,

Rohit

Please mark this answer as the solution if it resolves your issue.
Appreciate your kudos! 🙂

[schrodinger · Accepted solution]

@Vijay_A_Verma 's solution worked like a charm aswell!  

Price Change = IF(Sheet1[Rank]=1,TRUE(),(COUNTROWS(FILTER(Sheet1, Sheet1[Item ID]=EARLIER(Sheet1[Item ID]) && Sheet1[Rank]=EARLIER(Sheet1[Rank])-1 && Sheet1[Cost]<>EARLIER(Sheet1[Cost])))>0))

[amitchandak]

@schrodinger , This need to be something like that

Price Change = IF(Sheet1[Cost] = maxx(FILTER(Sheet1, Sheet1[Item ID]=EARLIER(Sheet1[Item ID])
&& Sheet1[Rank]=EARLIER(Sheet1[Rank])+1 ) ,Sheet1[Cost]),TRUE(),FALSE() )