Issue with 3-point smoothing

HI,

I am trying to reduce my baseline noise with a 3-point smoothing filter. Attached are my printscreen result and my vi. I found that the 3-point smoothing did not have a significant effect to smooth the baseline. 

I wonder if I programmed it wrong or the idea of 3-point smoothing is not a ideal way to reduce the background noise. In my case, it's ~0.7+/-0.2.  

Please comment, 

Michael