Need help

1. I have two data arrays with time series, factual data and forecast data, second array have one more value than first but not have date, can i add this point without date? i also trying deal last date + 1 day, but does't work for me because sometimes data are entered with some frequency Сan I build the chart not by dates, by points (x = 1,2...,n) but to display on a horizontal axis of date? (use dates as labels for this points (x))

1. can i customize the display dates without time, i need only date

1. can i change colors of active points (or set this equal to line color)?

thanks