NCV graph problem

Hi,

I have a problem making NCV graph. I have a test which send something like "Total: x" (where x is an integer). The test returns these values : 0, 0, 1, 1, 1, 0. On the graph I have 0, 0, 0.163, 1, 1, 1, 0.837 and I don't understanf why..

I'm quite new to hobbit's graph, is that an avegare value or something ? If so, is there a way to graph only what the script returns ?

Thanks in advance.