When I use a trendline that has a higher value than any of the Y-values provided in the dataset(s), it becomes invisible in the graph.
I'm quite sure that there is no way to let Fusionchart adjust the maximum Y value according to values given in both the dataset and the trendline.
The only thing I can do to fix this is to manually monitor the highest value in the dataset and then determine if the trendline has a higher value. If this is the case, set yAxisMaxValue to the trendline value.
It would be very convenient to have Fusioncharts doing this automatically. So there's my suggestion!
