Cummulative Average in Line Chart

Hi,
Thank you for your support. I found the way to plot the line chart correctly from  Youtube Power BI Cumulative Lince Chart. We just need to add ALLSELECTED in the Calculate filter.

CumulAverageDaysOpen_RITMActive = // the formula calculate cumulative Average Days Open for Active RITM for the last 12 complete months. 
VAR CurrentDate = TODAY()
VAR LastFullMonthEnd = EOMONTH(CurrentDate, -1) -- End of the last full month
VAR StartDate = EOMONTH(LastFullMonthEnd, -12) -- Start date, 12 months before the end of the last full month

-- Table with all dates within the range
VAR DatesInRange = 
    FILTER(
        ALL('DateTable'),
        'DateTable'[Date] > StartDate &&
        'DateTable'[Date] <= LastFullMonthEnd
    )

-- Cumulative average calculation
RETURN
AVERAGEX(
    FILTER(
        DatesInRange,
        'DateTable'[Date] <= MAX('DateTable'[Date])
    ),
    CALCULATE(
        AVERAGE('Active RITM Delivery Time'[Days Open]),
        ALLSELECTED('Active RITM Delivery Time'), 
        'Active RITM Delivery Time'[Created] <= MAX('DateTable'[Date])
    )
)