Show all datetime dates when null values in the end

I have a data array with these values, see under. I can draw a line graph with gaps where the value is "null". The problem is when i have "null" values in the end of the graph. The datetime axis is stopping with last last real value: [1543908000000, 103915.9], even if its more null values left. I now its only null values but i want the graph to show the remaining dates, even if its null values.

[1543900200000, 103915.6],[1543900800000, null],[1543901400000, null],[1543902000000, null],[1543902600000, null],[1543903200000, null],[1543903800000, 103915.4],[1543904400000, 103915.7],[1543905000000, null],[1543905600000, null],[1543906200000, null],[1543906800000, null],[1543907400000, null],[1543908000000, 103915.9],[1543908600000, null],[1543909200000, null],[1543909800000, null],[1543910400000, null],[1543911000000, null],[1543911600000, null],[1543912200000, null],[1543912800000, null],[1543913400000, null],[1543914000000, null],[1543914600000, null],[1543915200000, null],[1543915800000, null],[1543916400000, null],[1543917000000, null],[1543917600000, null],[1543918200000, null],[1543918800000, null],[1543919400000, null],[1543920000000, null],[1543920600000, null],[1543921200000, null],[1543921800000, null],[1543922400000, null],[1543923000000, null],[1543923600000, null],[1543924200000, null],[1543924800000, null],[1543925400000, null]]