strange overshot when make a step

[paulohbsa]

hello,
I am using Rickshaw to make an real time chart.
When a step happens in my data a small overshot appears (the curve goes above the real value and then returns).
You can see this in the image (inside the white circle). It happens with all the three series and every time a step happens, up or down.

Anyone knows what mistake I am doing?

Thanks in advance for everyone.

[paulohbsa]

I think I just solved this issue, by change the interpolation to any of the options but the 'cardinal' one.
Withe any of the other options the overshot doesn't happen.