Hello,
First of all, thanks for your comments,
About graphing less points, you're right, mainly the points more distant in time, I already tried to do that, but it didn't improove what I was expecting, but probably my algorithm to remove old points can still be improoved (you know messing with arrays is allways trycky, because of memory issues), I'll give it a better try, but with 16 channels I'm not very sure it will completely solve my problem...
About the Paul's comment, the vi I posted was just an example for demonstrative purposes, my graphing is even in a diffrent vi than the acquisition and the refresh rate is 2 times per second witch is the frequency that the data arrives.
Thanks, Paulo