millis() time drift

[mrefex]

As we all know plotly causes a time drift when sending the millis() with your data. I know for sure my time drift in millis can be divided in 2. But whatever i tried i don't know how to do this.

Does anyone have a solution to this time drift issue ?

graph.plot(millis(), p1, tokens[0]); // if i can divide millis into 2 than my drift will be much more accurate.