Dynamic text card visual based on filter selection

Hi Jayaselvan 

I was able to make the logic for scenario 2, where there is a single country selected. I don't have any more time today to work on scenario 1, but maybe someone else can help you with it or otherwise I can look at it later.

You can create a measure like this:

CardVisual Text = 
//single or multi select
VAR singlecountry = HASONEVALUE(Customer[country])

// single country scenario
VAR SelectedCountry = SELECTEDVALUE(Customer[country])

// selected month
VAR slicerSelection = MAX(Orders[Tr_Mn_Yr])

//Previous month formatted as text
VAR PrevMonth = SWITCH(MONTH(DATEVALUE(slicerSelection)-28),1,"Jan",2,"Feb",3,"Mar",4,"Apr",5,"May",6,"Jun",7,"Jul",8,"Aug",9,"Sep",10,"Oct",11,"Nov",12,"Dec")
VAR PrevYear = YEAR(DATEVALUE(slicerSelection)-28)
VAR slicerSelectionpr1= PrevMonth&" "&PrevYear

//2 months ago formatted as text
VAR PrevMonth2 = SWITCH(MONTH(DATEVALUE(slicerSelection)-56),1,"Jan",2,"Feb",3,"Mar",4,"Apr",5,"May",6,"Jun",7,"Jul",8,"Aug",9,"Sep",10,"Oct",11,"Nov",12,"Dec")
VAR PrevYear2 = YEAR(DATEVALUE(slicerSelection)-56)
VAR slicerSelectionpr2= PrevMonth2&" "&PrevYear2

//revenue in selected country last month
VAR selCountryPrev = CALCULATE(SUM(Orders_Product_Level[Revenue]),Customer[country]=SelectedCountry,Orders[Tr_Mn_Yr] = slicerSelectionpr1)

//revenue in selected country 2 months ago
VAR selCountryPrev2 = CALCULATE(SUM(Orders_Product_Level[Revenue]),Customer[country]=SelectedCountry,Orders[Tr_Mn_Yr] = slicerSelectionpr2)

//revenue in selected country in selected month
VAR selCountryCurrent = CALCULATE(SUM(Orders_Product_Level[Revenue]),Customer[country]=SelectedCountry,Orders[Tr_Mn_Yr] = slicerSelection)


//growth claculation logic
VAR growthSincePrev2 = ROUND(((selCountryCurrent-selCountryPrev2)/selCountryPrev2)*100,2)
VAR prev2change = IF(growthSincePrev2>0,"increased","decreased")
VAR growthSincePrev = ROUND(((selCountryCurrent-selCountryPrev)/selCountryPrev)*100,2)
VAR prevchange = IF(growthSincePrev>0,"increased","decreased")


//text concatenation
VAR singleCountryText = "The " & SelectedCountry & " has " & prevchange & " by " & growthSincePrev & "% when compared to " & slicerSelectionpr1 & ", and " & prev2change & " by " & growthSincePrev2 & "% when compared to " & slicerSelectionpr2 &"."

// multiple countries TO BE FINISHED
VAR RevenueCurrent = CALCULATE(SUM(Orders_Product_Level[Revenue]),Orders[Tr_Mn_Yr]=slicerSelection)


RETURN
// if single selection show the text output for that, else show placeholder
IF(singlecountry,singleCountryText,"Multiple selections logic to be done")

 and add the measure to a card visual.
If multiple values are selected it will show a placeholder text, if a single country then it will show the described scenario. See my examples:
UK, Sept

USA, Nov:

I hope this helps.