Creating Trends Over time

Hi powellar ,
Here are some steps you can try
Sample data
Table 1

Table2

Create measures

Difference = 
VAR _count = 
CALCULATE(
    COUNT('Table 1'[Date]),
    ALLEXCEPT(
        'Table 1',
        'Table 1'[Date]
    )
)
VAR PreviousCount = 
CALCULATE(
    COUNT('Table 1'[Date]),
    ALLEXCEPT(
        'Table 1',
        'Table 1'[Date]
    ),
    DATEADD('Table 1'[Date], -7, DAY)
)
RETURN
IF(
    ISBLANK(PreviousCount),
    _count,
    _count - PreviousCount
)

NextDifference = 
VAR NextDifference = 
CALCULATE(
    [Difference],
    ALLEXCEPT(
        'Table 1',
        'Table 1'[Date]
    ),
    DATEADD('Table 1'[Date], +7, DAY)
)
RETURN
IF(
    NextDifference = BLANK(),
    0,
    NextDifference
)

IsBreakingPoint = 
IF(
    [NextDifference] <= 0 && [Difference] >=0 || [NextDifference] >= 0 && [Difference] <=0 ||
    SELECTEDVALUE('Table 1'[Date]) = 
    CALCULATE(
        MAX('Table 1'[Date]),
        ALL('Table 1'[Date])
    ) ||
    SELECTEDVALUE('Table 1'[Date]) = 
    CALCULATE(
        MIN('Table 1'[Date]),
        ALL('Table 1'[Date])
    ),
    "Black",
    "White"
)

The above MEASURE is to determine if the point is a turning point or both ends of the end point
Enable datalables and apply the measure to value color

Final output

In order for multiple tables to be realized on the same line chart, you need to create relationships between the tables

Best regards,
Albert He

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