Graph Trend Line between 2 points changing


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I've noticed that if DF has been switched OFF for a few days. The trend line between the data points that DF was switched OFF keeps changing every few seconds. See the attached images (period: day 17th and day 18th). The graph is a 7-day graph. It's not a major problem as DF will normally be ON all the time. I was just looking for any suggestions on how to stop this.









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It is because of the way DAQFactory optimizes the graph data on large data sets.  It does a boxcar min/max and as new data comes in the boxcar locations change causing those mins/maxs to change slightly, especially at edges like when no data is coming in.  This can make the connecting line jump around.  Normally you can't see it because its only one pixel.

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