Timeline or replacement

Yes you can do many things with the code. It simply builds up a string based on your rules.

So it can change the Characters based on the status.

So you can have severval variables for the different Statuses

VAR __FULLCHARState1 = 9679 -- State1
VAR __FULLCHARState2 = 128523 -- State2
VAR __FULLCHARState3 = 128546 -- State3

Then you can conditionally Set _FULLCHAR or even build the string using a mixture of Characters

The return basically repeates the blank Char to get to the start then the required char for the duration. However it can be adapted to do anything you want.

IF(
        NOT ISBLANK(__BASE_VALUE),
            REPT(UNICHAR(__BLANKCHAR), __START_RATING) &
        REPT(UNICHAR(__FULLCHAR), __BASE_RATING)              
    )   

Its a variation on cwebb Star Rating Dax http://community.powerbi.com/t5/Quick-Measures-Gallery/Star-Ratings/m-p/166903

He's also got a links to a blog post with other variations.

Play around with the Expressions. If you download my example it has a number of examples and a data set to play with.

GanttDot =
VAR __MAX_NUMBER_OF_BLOCKS = 100
VAR __MIN_RATED_VALUE = 0  
VAR __STARTBASE_VALUE = MIN(Durations[StartTime])
VAR __BASE_VALUE = Sum(Durations[Minutes])
VAR __MAX_RATED_VALUE =  CALCULATE(MAX(Durations[EndTime]), ALL(Durations))
-- Monospace characters
VAR __BLANKCHAR = 32 -- Space
VAR __FULLCHAR = 9679 -- Dot
VAR __NORMALIZED_STARTBASE_VALUE =
    MIN( MAX(
        DIVIDE(
            __STARTBASE_VALUE - __MIN_RATED_VALUE,
            __MAX_RATED_VALUE - __MIN_RATED_VALUE
        ), 0 ), 1 )
VAR __NORMALIZED_BASE_VALUE =
    MIN( MAX(
        DIVIDE(
            __BASE_VALUE - __MIN_RATED_VALUE,
            __MAX_RATED_VALUE - __MIN_RATED_VALUE
        ), 0 ), 1 )
VAR __START_RATING = ROUND(__NORMALIZED_STARTBASE_VALUE * __MAX_NUMBER_OF_BLOCKS, 0)
VAR __BASE_RATING = MAX(ROUND(__NORMALIZED_BASE_VALUE * __MAX_NUMBER_OF_BLOCKS, 0),1)
RETURN
    IF(
        NOT ISBLANK(__BASE_VALUE),
            REPT(UNICHAR(__BLANKCHAR), __START_RATING) &
        REPT(UNICHAR(__FULLCHAR), __BASE_RATING)              
    )