Compare this day with another day (year, month and day)
Returns 0 if both dates are the same
-1/1 if year and month is equal, but date is different
-2/2 if year is equal but month is different
-4/4 if year is different
8 if total failure.
Information for the class that allocates screenspace wheter a particular
indicator requires a separate screen space or if it shall be painted with
the candlesticks.