Today vs Yesterday

@bgood,

When it comes to time intelligence in DAX, there are always a ton of different ways to accomplish the same thing. Here’s just one approach via 3 separate measures:

Today's Price = 

CALCULATE(
    SELECTEDVALUE( 'HRC Data'[Price] ),
    Dates[Date] = TODAY()
)

Yesterday’s Price =

CALCULATE(
    SELECTEDVALUE( 'HRC Data'[Price] ),
    Dates[Date] = TODAY() - 1
)

Price Diff =
[Today’s Price] - [Yesterday’s Price]

I hope this is helpful. Full solution file posted below.